As for age of consent and other things,
Mind that age of consent and adult age are not usually the same, and if you investigate around the world, you are due to some pretty surprise.
For instance, in Italy age of consent is 14. Theoretically a grown ass man could sleep with a 14 years old girl (or any gender combination) and they are technically fine, as long as it can be proved that the minor was indeed freely consentient. I wouldn't try the stunt by the way, you would be still considered morally horrible and you could still end up in trouble. But like if there is a minimal age gap not many would be bothered. When i was 21 i dated a 16 girl for some time. I knew her family, they where cool with it, no big deal. If i would do it now in my 40's of course things wouldn't be smooth at all.
In other parts of the world it varies, but it's very frequently under the legal age. I believe in europe the average runs between 14 and 16. I think Japan's age of consent is stil 13 and i'm not entirely sure they even have an official adult age.