I wouldn't hurt a flea. I'd finger a spider though.
When someone you love is hurting, if it was possible, you'd want to take their pain for them. But do I really want cramps and sore boobs?
I love watching people get hit in the crotch. But only if they get back up. If their teeth are bleeding, if they're really hurt, if an ambulance has to come, I'm not laughing.