17 year old male + "sexual intercourse is a gross chore that I would never get involved in" is an unusual combination, to say the least.
Wanting to remain a virgin is a different issue, it can be commendable that guys hold out due to their moral/religiuos beliefs, but not want to get into a girls pants? Wanting to get into a girls pants typically drives teenage guys OUT OF THEIR MIND, even if they are too shy to act on it.
Regardless, the abuse thing kicks this up a notch. Even if it was physical and non-sexual, abuse during formative years is typically enough to burden one in non-obvious ways. My bet is that the abuse and the unusual response to a girl's equipment are related.
I hope that you have a care giver that can spring the bucks for a good psychotherapist if you don't have it. I suspect that being in SD might make it a bit difficult to find a good one though...