He just hasn't learned how to fully respect and appreciate his partner yet.
It IS a biological thing, no matter how much you hate it. No matter what, theyre going to want to look at someone he thinks is attractive. The only thing you can do is hope they L e a are and what is respectful, what is disrespectful, and hope that they respect you enough to stop this behavior.
Don't you just hate when a guy like the dude at the top blames biology?