I want to have sex now and want to know if you can have sex at 18
I would say yes but it depends on your country or state laws
It depends if you believe in the sex-before-marriage thing. Up to you.
of cource you can it is your choice, girls are haveing sex at 12 I am sure you talk to friends at school ! if you don`t want to get pregnat get protection now or masturbate. or practice oral sex! Just sayin,