I'm on my univ's boxing team, and the practice gym was built years ago so the showers are not separated and the locker room itself doesn't have many partitions. Hence, I've seen most if not all of my team member's cocks. I would say that most are average or what one would expect from any group of random guys. I'd rank myself among the biggest, so no, fighters are not freakishly hung. Also, I'm personally not aggressive or violent outside of the ring in any manner.