Is it weird?

Is it weird that I know a lot about sex than my male and female classmates? I'm 15 and my friends are really weirded out that I know so much about sex and the different kinds of position, kinks and such. They always ask 'Are you still a Virgin?' And I'm just shocked that they would assumed that I lost my v-card early (fyi being virgin at my country is like a sin) and they always joke around that I'm gonna be the first one to have sex and such, and I just want to have friends that aren't weird out by me knowing sex and such ;-; I just want to tell my experiences with a person who is open minded.