It's interesting--we talked about sexuality at my HF autism group of females and most of us are not too, um, horny. Many are borderline asexuals. I think it's because so many aspies associate themselves with more the masculine than the feminine. However, when questioned further by the facilitator, aspie women of all adult ages stated that their sexuality was like a slider. Sometimes they felt more feminine and sometimes more masculine.
I attest to this. In church, I totally exercise my feminine side. Lots of skirts and little children and talk of families and such. I love it, it's one of my favorite reasons for going. On the other hand, I don't like NT women, I find them fickle and concerned about ridiculous things, especially outside of church women. Many aspies also tend to express more "masculine" emotions. For example, we don't all cry when presented with frustration, many just get mad. A reason proposed for the increased masculinity of the group was that so many aspie women were bullied and automatically fell into a script of aggression towards others. Of course, most of us find womanly pursuits uninteresting and tend towards other special interests, so that helps define our sexuality as well.