Southpaws...

Dogs always pee on the north side of the tree, why do you think it's always GREEN!!!

Sincerely,
Delivery Boy...

So if there's a strong wind blowing south to north ol' Fido goes all over himself, eh?

Guess that's why cats go in litter boxes - so humans can clean up after them.

Righties could throw pee until 1920, when trick pitches were disallowed. Unable to relieve themselves, pitchers had to be removed from the game more often, and Relief Pitchers became more needed. Firpo Marberry was the first beneficiary. 15% of games were thus saved.