Boyfriend wants to hump me?

We are both 19 and have been dating for a while. He has a higher libido than me, but I think our sex life is good. I assume we both ocassionally jerk off on our own, though we’ve never explicitly talked about it.

Yesterday we were in bed in our underwear and he started cuddling me, which we did for a while. Then he starts rubbing himself up against me. We had sex the day before, so I’m not too interested in doing it this day, so I don’t really reciprocate or anything.

He’s basically humping my leg/thigh at this point and asks if this is okay. I say sure. Then he pulls his underwear down and straddles my leg and starts humping me more.

After hardly a minute he announces he’s going to cum. I’m thinking wtf!? Then he cums on my leg and side.

I found this a little strange, was just wondering if anyone else has had this experience?

I’m fairly ambivalent to the situation. It didn’t do anything for me really. I was a little annoyed at getting cum all over me and having to go clean up, I wasn’t expecting that. Also feel a little “used” if that makes sense?

If he had wanted a handjob or blowjob I would’ve been fine with that. Not trying to hate on people’s kinks, but humping me like a dog? Thought it was a little weird.