Why do i constantly get made fun of?

okay im almost 17 ive had a kiss few gf's ect. i have all brothers and my brothers are pretty much tramps. i on the other hand have goals and ambitions i actually want to go to college. but the problem is everytime they bring up women they all start in on me about being a virgin and things of that nature. im the type who wants to be old fashioned open doors ect. and rather get to know the girl build a relationship and have actually mean something. am i wrong for being that way or what? they treat women like theyre a piece of meat. im a middle child.