If you are wondering how to talk to your son about puberty, wet dreams are a good place to start, because they often catch boys by surprise. The short version: tell him before it happens, keep it calm and factual, and explain three things in plain words. A wet dream is ejaculation during sleep, it is a normal part of growing up, and he cannot control it. A short, matter-of-fact talk now, with the door left open for later questions, usually works better than one big serious conversation.
In brief:
- Wet dreams are ejaculation during sleep, driven by puberty hormones.
- Boys often have the first one around 12 or 13, but timing varies.
- Talk early, keep it short and calm, and never tease.
- Offer practical help: a towel, spare underwear and an easy laundry plan.
- Ask a doctor if he is upset or worried, or if you have questions.
In this article · 9 min read
Nemours KidsHealth describes wet dreams (also called nocturnal emissions) as ejaculation during sleep. They are caused by the rise in the hormone testosterone during puberty, they are a normal part of growing up, and they do not cause harm (KidsHealth, reviewed September 2024). Cleveland Clinic adds that they are orgasms during sleep that happen without conscious control, and that hormones, sexual thoughts (which are not required) and friction from bedclothes can all play a part (Cleveland Clinic).
For a boy who has never heard of this, it can be confusing. He may wake up to damp sheets and think he has wet the bed, or that something is wrong with him. That is the main reason to talk first.
When do wet dreams start?
There is no exact date. UCLA Health says puberty can normally start anywhere between about 9 and 15, with first signs often around 10 or 11, and that being early, average or late is all normal (UCLA Health, November 2023). Cleveland Clinic says wet dreams often first appear around 12 or 13, and that researchers estimate 70% to 90% of boys have them. Not having any is also normal.
An official sex-education guide for teachers, published on Éduscol, the French education ministry's website, gives a similar picture for the first ejaculation in general: it usually happens between 11 and 15, but it can come as early as 9 or as late as 17, depending on each boy's own pace (Éduscol, 2025, in French).
So the best time to talk is a little before you think he needs it. If he is 10 or 11, or you have noticed the first signs of puberty such as more sweat or body hair, now is a good moment. Wet dreams usually become less common as a boy gets older.
How to talk to your son about puberty and wet dreams, step by step
You do not need a perfect speech. UCLA Health advises staying calm, honest and matter-of-fact, listening as much as you talk, and not letting embarrassment stop the conversation. Here is a simple way to do it:
- Pick a relaxed moment. Many boys find it easier to talk side by side, in the car or on a walk, than face to face. Warm up with an easier puberty topic such as deodorant or shaving, and move on from there.
- Say what it is, in plain words. Use the correct terms and keep it short. For example: “At some point, while you are asleep, your body may ejaculate. That means some semen comes out. It is called a wet dream.”
- Say why. “Puberty hormones make your body start producing semen. Sometimes it comes out during sleep. You don’t cause it and you can’t stop it.”
- Say that it is normal. “It is very common, and many boys have it. It does not mean something is wrong, and it is not the same as wetting the bed.”
- Cover the practical bits (see the next section), so he knows exactly what to do.
- Leave the door open. Cleveland Clinic suggests keeping it brief and low-pressure and letting him know he can come back to you. Something like: “You can ask me anything, even if it feels awkward.”
Here is a quick guide to wording:
| Helpful | Better to avoid |
|---|---|
| Matter-of-fact, correct words | Jokes, nicknames or teasing |
| “It’s normal and it happens to many boys” | “Don’t worry about it” and then silence |
| Private, one-to-one conversation | Mentioning it in front of siblings or guests |
| Short talks, repeated over time | One long “big talk” he can’t escape |
| Listening to his questions | Asking him for details |
If you would like to hear a paediatrician on the subject first, this episode from NewYork-Presbyterian Hospital is a good start: Dr. Edith Bracho-Sanchez talks with host Faith Salie about ways to talk to children about puberty and its changes, and about why puberty may now start earlier.
How do I talk to my kid about puberty? (NewYork-Presbyterian Hospital)
The practical side: a simple “just in case” plan
Most of the worry about wet dreams is about the morning after. Taking that away makes the whole subject easier. Agree on a plan together:
- Keep a towel or tissues by the bed. KidsHealth says that if he is concerned, a towel nearby helps, because he may wake up during one or sleep right through it.
- Keep spare underwear and pyjamas within reach. For sleepovers, KidsHealth suggests packing a change of underwear.
- Make laundry his own business, if he wants. Cleveland Clinic suggests removing soiled clothing and bedding and washing them, and washing the penis and surrounding skin with soap and water. A laundry basket in his room, and a simple way to start a wash, keeps it private.
- Do not make a fuss about stained sheets. If you find them, a calm, brief comment is enough, or none at all.
Magda Pabst's view
In 100 Mysteries of Puberty for Boys, Magda Pabst speaks to the boy himself, and her message is reassuring: wet dreams are common and normal in puberty, and often the first sign that his body has become fertile. Her plan against embarrassment is deliberately low-key: tissues and a spare pair of underwear by the bed, so he can change quickly and go back to sleep, and a word to a parent, even if it feels awkward, because they will understand and can help. That last point is where you come in: if he has heard from you beforehand that this is normal, telling you will feel much less strange.
What if he does not want to talk?
Some boys go quiet at the first mention. That is normal too. UCLA Health suggests offering books, reliable websites, his pediatrician or another trusted adult if he is uncomfortable coming to you. Cleveland Clinic’s advice is not to avoid the topic if you notice signs in the laundry, but to keep it short and leave the door open.
It also helps to remember that this is not a one-time talk. Puberty goes on for years, and UCLA Health recommends keeping communication open as he grows, including on topics such as consent. A few short, relaxed conversations are better than one long one.
Myths and facts
| Myth | Fact |
|---|---|
| “He did it on purpose.” | He cannot control it. KidsHealth says you can’t prevent wet dreams. |
| “It means something is wrong.” | KidsHealth says it is a normal part of growing up and not a sign of a health problem. |
| “It’s the same as wetting the bed.” | No. It is ejaculation, not urine. This is the main thing many boys worry about. |
| “Every boy has the first one at the same age.” | Timing varies, and some boys have few or none. |
| “He should be embarrassed.” | It is very common, and shame helps nobody. |
Where the book fits
100 Mysteries of Puberty for Boys by Magda Pabst is written straight to the boy, in a direct and humorous tone, and it is a good “second voice” for a son who does not want to talk to a parent about this. Its third chapter has a short section on ejaculation and wet dreams, with the practical plan described above. The book gives its own rough age guide for this, so treat it as an estimate and not as a medical rule. The book also covers erections, body changes, hygiene, feelings, friends and the internet. Some chapters are quite frank about sexuality, so you may want to read it first, then decide when to hand it over.
It is not a medical book and does not diagnose anything. It also does not cover early or late puberty as a health topic, so for that your doctor is the right person.
Books Go Publications is an international publishing house, and its puberty guide for boys exists in English, French, German and Spanish, each edition checked by a native-speaker editor so that the humour still works in every language.
When to talk to a doctor
Wet dreams are normal and need no treatment. A conversation with your doctor makes sense if:
- your son is very upset, ashamed or anxious about them;
- you or he have questions you cannot answer;
- you are worried about his development in general, for example if puberty seems very early or has not started.
KidsHealth’s advice is simple: they are not a sign of a health problem, but if you have questions or concerns, talk to your doctor. If your son seems low or anxious beyond this topic, you can find support services through the international directory findahelpline.com.
You can also read our guides for teen boys on voice change and on hygiene, sweat and a simple routine, which fit well into the same conversation. More guides are on the Books Go Publications blog, and more books on the Books Go Publications home page.
Who it is for
This guide is for the adults who want a boy to hear about wet dreams calmly, before they happen.
- Parents of a boy around 9 to 12: have a first short talk before the first wet dream, so it never comes as a shock.
- Fathers who never had this talk themselves: the sample sentences give you simple, calm words to use.
- Mothers raising a son: the practical plan and the wording table help you raise the subject without embarrassment.
- Boys who prefer to read first: the myths and facts table answers questions they may not want to ask out loud.
Key terms
- Puberty: the years when a child's body matures into an adult body, driven by hormones.
- Testosterone: the main male sex hormone, which rises during puberty and triggers many of its changes.
- Wet dream (nocturnal emission): ejaculation during sleep, a normal part of puberty that cannot be controlled.
- Ejaculation: the release of semen from the penis.
- Semen: the whitish fluid that carries sperm and comes out during ejaculation.
Frequently asked questions
At what age do boys start having wet dreams?
Often around 12 or 13, but it depends on when puberty starts, which can normally be anywhere from about 9 to 15 (Cleveland Clinic; UCLA Health, 2023). Some boys have them earlier or later, and some have very few.
Is a wet dream the same as wetting the bed?
No. A wet dream is ejaculation during sleep, caused by puberty hormones, and it is not urine. Telling your son this in advance saves many boys a lot of worry.
Can wet dreams be prevented?
No. KidsHealth says you can’t prevent them, and Cleveland Clinic says nothing can stop them. They usually become less frequent as a boy gets older.
Should I mention it if I find stained sheets?
You can, briefly and calmly, as Cleveland Clinic suggests: don’t avoid the subject, but keep it low-pressure and leave the door open. Many parents find it easier to have the talk beforehand so nothing needs to be said in the moment.
What if my son says he does not want to talk about it?
Respect that, and offer other ways to get answers, such as a book, a reliable website, his pediatrician or another trusted adult (UCLA Health). Let him know you are always available.
Do girls have wet dreams too?
Cleveland Clinic says girls can have similar experiences, although they are less noticeable. It is worth explaining this to all your children, so no one feels alone.
Sources
This article is for general information only and does not replace advice from a doctor, dietitian or other qualified professional.
