Okay, to clear up the germ free pee. Yes it is true, pee is sterile until it sits out for awhile. Pee is safe to drink right from your body. Now what Bear Grylls did in Baja was stupid he carried the pee for awhile before he drank it. So bacteria was forming when he drank it.
Clear pee means your body is well hydrated and water is flushing toxins out of your body. The reason your body produces yellow pee is because the kidneys take toxic stuff out of your body and it leaves through your pee and poop. The less water in your body, the more concentration of toxic material.
As for piercings it should not be an issue anywhere on your body as long as its taken care of.