DAMN! The first guy being punched was erotic, But the second guy didn't flinch with all those hard punches. People want to see those punches break down those ab muscles and eventually can no longer repeal those fists. When the fists go deep into the abs and the punchee gives off those erotic "oooooff" sounds and causes the back to learch back & upward is when you reach full eroticism. Like with the first guy!!

More of the first punched guy :-)