I had a lot of guy friends in high school, some of which I still consider friends that never showed any sort of interest in me.
They could all have secretly wanted to do me I guess, it's possible.
I really don't think so though. When you are the fat
ugly friend and they very obviously want to screw all your hot friends instead...you don't really worry about such things. In fact the idea that maybe one of them might want to do you is pretty much out of the question. But I tend to believe it is true that given the chance, even if they aren't super attracted to the girl, -most- guys would still hook up with them if there wasn't a better option available.