I've been very curious about this for a while. I suspect my husband and I are both Aspies (our son was recently diagnosed and we have all the same behaviors that qualified him). My husband has very, very little sex drive. He refers to himself as a "prude," because he has only been aroused a handful of times and is uncomfortable watching anything beyond soft-core videos. He doesn't understand flirtation, romance, or physical attraction, but has a strong need for a partnership. I'm the opposite. I have much, much more severe sensory issues than he does, and I feel bombarded by sexual stimuli all day (TV, people in stores, random thoughts, my clothes etc.). I also dislike light touch, cuddling, eye-contact, restaurants, and basically everything that goes along with romance and relationships. As a result I just want sex as a release/relief, and I want to skip all the foreplay and after glow stuff. Before I met him I only wanted casual relationships or flings. I also find it easier to get along with someone if the relationship is limited to physical interactions, and I don't have to try to understand, express, or discuss my feelings.
My husband was the first person I felt like I could be around 24/7 as well as completely be myself. So I married him. But our sexual mismatch is kind of a problem. We are both so bad at romance every attempt to create it has been more humorous than successful. He's not repulsed by sex with me, but he's indifferent to it, which makes it hard for me to have the confidence to be intimate with him.
We watched a documentary recently on human sexual attraction, and now he's attempting to imitate "interested alpha male" behavior. I'm not sure how well this will work.