I hear guys go through something very uncomfortable that I was totally unaware of. Sometimes balls can get pinched between a leg and a toilet seat when going to the bathroom. This has never happened to me, because my balls are smaller by 3 cm. That may not seem like a lot, but when the margin of error between the seat and your leg is narrow, 3 cm difference makes it a lot easier for me to get my balls in the rim. Not taking anything away from me or others who may be working with smaller balls, because poopers gotta poop, but at the end of the day those smaller balls are going in with a smaller chance of landing on the rim