[skeeter]

I feel guilty about peeing in the Pacific while surfing.

[Little Bill]

I never felt guilty about doing the same in the Atlantic, something about a whole lot of water excites the bladder.

[svcw]

My daughters and grandkids pee in their wet suits, when they surf/bogie board, they all claim that’s how its done. Have you heard of that?

[goron]

Peeing in the ocean attracts sharks, so what you 'feel' might not be guilt, but a sense of primordial instinct for danger.

As for the corn floating in public pools, I always thought someone nearby was feeding pigeons..