re: #17 Erik The Red

Now for me if I feel I am in a fight that I can not win I just go for the gonads.

re: #18 Racer X

If you have a choice go for the groin.

I dunno, that seems kind of a long shot — the odds of actually successfully hitting the testicles seems pretty slim. Plus, they’re well-protected between the legs, and one would have to kick them, not punch.

Hitting the face just makes your fist hurt.

Then why does everybody do it?

If you are fighter trained and the muscles are strong and you are anticipating the punch it will have hardly any effect.

Ah, but the vast majority of people are not trained boxers. So their muscles are not as rock-solid. And because no one ever seems to target the solar plexus, it is less likely to be anticipated.