It's frightening enough with a male actor and not a stunt person. If you accidently punch him with the wrong hand, then you've cost them a week's work and they've got a black eye or a lot of money goes on CG to get rid of it. That was nerve wracking, but it was very civilized. Women tend to immediately take responsibility if somebody messes up with both of us saying it's our fault. Men are quite happy for it to be your fault it seems like.