Dudes don’t really train against getting slapped. Hook punches aren’t the same thing as getting slapped upside the head. You could dodge punches all day then go home and get slapped up by your mom.
I’m saying this because most people seem to go right to their primal response when they get slapped. It’s a blind spot. My first instinct is to slap someone right back and that’s predictable. It might be something someone could exploit.