Getting wet for someone I don’t like at all

Yesterday I got wet just because a guy, a friend of mine whom I’ve never found attractive, was hugging me from behind and caressing my belly. So now I’m really confused. I mean, I don’t like him at all. The way he talks to me, the way he touches me, pretty much all of him, I don’t like it, I don’t find it sexy. He’s not my type. I know he likes me and would like to have sex with me, but it never happened because I’ve never wanted to do that with him. But why was I so wet yesterday? Maybe because I’ve not had sex in a long time and my body reacts even for someone I don’t like at all? This is making me feel not like myself right now. Is it normal? Has someone here had the same experience as me?