Most Helpful Girl
It's not okay. No one ever said it was.
A guy who slaps his girlfriend would come off as weak-willed, lacking in self-control, poorly discipline, and quite frankly a prideful pussy trying to soothe his ego. Most men are stronger than woman and there's truly no legitimate need to smack a woman other than the fact that guy got his feelings or pride hurt and wants to feel better. Especially if he eagerly wants to hit her but would hesitate with a man his own size or taller and stronger...
Most Helpful Guy
Because equality only lasts until there's more benefit to the woman assuming a traditional role.