Two reasons:
- Because they work in an industry where the girls are often disposable fuck-trash and seldom acknowledged as human… while the boys matter even less. Venting their simple-minded rage on some empty-eyed, limp-bodied nothing of a woman who’s getting paid 10x their asking price is pretty much all the job has going for it.
- Because it makes the audience wet.
I prefer laughing at girls, myself.
