I don't want to get aroused when with a partner

I'm really not sure what's going on with me anymore.

After being molested when I was 15, I noticed a dramatic drop in wanting to physically be with a partner. I don't particularly enjoy sex but enjoy masturbating.

I identify as aegosexual.

A while ago, I made out with a trans man and felt a pang of arousal which automatically made me panic some. I really didn't mind him being trans. I just felt so uncomfortable with that one little pang which I hadn't felt with my ex.

Has anyone of you ever felt like this?