Last May 2019 I met a guy thru grinder. We check inn in a motel. He automatically naked himself and i myself just wore boxer briefs. I lay myself in the bed while he himself sits on me while rubbing his butt, until i felt like the head of my penis went out to my boxer brief and felt like the tip of my penis touch or somehow inserted to his anus but not sure. He sit then he didnt move like he is trying to really insert my penis. I then move him away then seeing the head of my penis was very wet and not sure of it is precum or from his butt hole.
My question is if my penis that time was really wet does it mean the head was inserted to his anus?
Am i possible infected already with HIV?
Chances of syphilis?