Cum is mainly protein, and has about 10 calories.
And as for peeing, yep, it's fine, but I did read an article about a guy who fell in a ice crevice while hiking in the arctic. He was pinned and had survive 2 days while his hiking partner went and got help. He knew from outdoor training classes, that you can drink your pee with no ill effects, but if you drink the same pee, you can only drink it up to 3 times .(Which he did) before it can be toxic He eventually had to cut off his arm to survive and get out, and he was rescued before he froze to death....lesson here: Drink pee all you want, but don't drink the same pee more than 3x!

Yeah, you needed to know.......lol.......