Is it normal that i love this?

I am a straight male. One thing I noticed is whenever I watch porn I will pay attention to the guys face while he is going to town on the female or getting his penis sucked. It makes me so much harder when I can see and hear that the man is really struggling not to cum during an intense scene. And it is amazing to listen and watch the guy cum after he had been holding it for a long time. I guess it is because I know how fucking good he must be feeling in that moment.

I really want to someday share a woman with another man for this very reason. And It would be hawt to have sloppy sex while sharing a female because it would turn me on to feel the other mans cock quivering and releasing precum onto my cock. It woild be perfect lube. I would love to just share a pussy and just wait until the other guy came. It would feel good to watch his face and feel his cum squirt all inside the girls pussy and around my cock.