You want prissy prim and proper teenage virgin girls? I drive by RC schools, and the girls (after class) look so slutty! All sorts of tights, stockings, and socks. Different styles of shoes. Shirt-tails pulled out. Where are they rape-able sweethearts of yesteryear?
You want to pursue this fantasy, I suggest that it be girls attending an Evangelical girls' academy or a schoolbus full of Mormon girls. Now these are girls who haven't been brainwashed into "sex is bad," morality. Rather, they've been emphatically taught to wait for marriage.
And they tend, as a population group, to be nice, middle-class or even up-scale chicks, and therefore nicely dressed, groomed, hair-styled, etc.
(And, for my fetish, more likely to be wearing pretty, dainty underwear....)
Something to think about!