They’re bullies, and there’s absolutely no rational thought going on. Their lizard brain presents them an action and they take it immediately without even the slightest self-control. Looking from the outside you can analyze the reasons for the particular form of their outburst, in this case because objectifying women is something misogynist men can bond over and because making an aggressive advance on someone they find attractive is exciting to them in a vulgar, cave-man type way, but internally they’re doing it because it feels good to them to do, they have no capacity to introspect or restrain themselves, and they’ve never been challenged or punished for it in any way.