If you can get aids from fighting why do people still fist fight?

I had never thought of getting any disease from fist fighting, but you're right. Anytime infected bodily fluids come into contact with broken skin the possibility of infection occurs. Very enlightening, thank you.

To answer your Q: I doubt they have thought of it either. Maybe it's the same reason people still have unsafe sex, they think it won't happen to them.

Where exactly are you fist fighting at on a person to get aids? I suppose it's possible if their blood came into contact with an open cut on you/your blood... But I've never heard of anyone getting into a fist fight and getting aids from it... so where are the facts that support your claim here? :)
I doubt seriously if there has ever been a proven case of HIV transmission from fist fighting.
you get pumped up and all logic goes out the door.
Some people think it's fun to fist fight, but then some people think it's fun to hit their head on the wall too. Never could figure out that one...