Men should not relieve themselves when hunting with hawks, as the hawk will see your, er, appendage as prey. According to Shaun, a falconer at the English School of Falconry in Bedfordshire, this rule was introduced after an actual incident. Ouch. I’m delighted to meet Shaun, mainly because I think “falconer”—along with “spy”, “explorer” and “I play guitar in U2”—is one of the coolest answers you can give to the question “What do you do for a living?”
While I don't agree with the above stated rule, I do recommend that you hide yourself behind a tree before you relieve yourself while hunting.
I recommend you read the rest here. It made me laugh out loud (I will not type LOL).