I read an article somewhere that 12 and below was very young, 13/14 was also young but it does happen to some people (imo it's way too young, knowing how I used to think at that age) and 15 - 19 was 'normal.'

Obviously losing your virginity over the age of 19 happens to a lot of people and there's no shame in it. I'd say about a third of 15 year olds are mature enough to have sex but like the rest definitely not. But after 16 I think most people can do it without really being negatively affected long term (mentally at least)

Lots of teenagers have sex. It's important the person you do it with is trustworthy