13 year olds should be reading about sex in internet forums.
They will probably get as real a response here. More than from parents,schools or friends (all of whom have an agenda).
Knowledge is power.
So if you are 13 and reading this, it is ok to be a virgin, the first few times you have sex you'll probably wonder what all the fuss is about, don't worry. Always try to look after your partners needs.
Sex improves with age.