Virginity

ok I have 1 questions how do you know if a guy is a virgin how can you tell??? I need the answer because my friends are asking these ?s because supposly they think I know everyhting about sex eventho I never experienced it before so can you tell me

there really is no way that I could think of to tell if a guy has had sex before, sorry if thats not the answer your looking for

Usually not always, by whether he stares at you confidently or looks away. But that is not 100% either