I'll add a problem!
My son, after a day at the beach, playing in the waves, climbing the rocks, digging in the sand, went to remove his swim suit.
His foreskin had worked its way through the mesh lining of his shorts. A lot of it. All ended fine but it included a lot of pain and bit of panic. Me trying to find scissors or a knife to cut it away. (The lifeguards and snack shack staff were horrified at "My son's foreskin is caught in his swimsuit" and were more than willing to help!) Him crying in the women's room afraid to move.
We have a rule now that everytime you pee in the ocean while swimming you have to check to make sure things aren't hooking up!