Why do I attract older men/pervs?

It seems like these are the only kinds of guys I attract: older men & guys my age who are kind of sick & see me as "innocent, naive" I'm 20 yrs old & by no means, am I a prude? But for some reason, I've been tagged the "good girl" by most guys. Why is this? My friend said it was because I have a "wholesome, babyface"? & that it was because of my mannerisms. This one guy even described me as the "nice Christian wife who waits at home for her husband." What is up w/ that?