Priming the fuel cell

"Oh my Goddess! What the hell are you doing?"

"Pissing in the fuel cell. What does it look like?"

"I know what it looks like! For cryin' out loud."

"Oh don't be a sissy. It's not like you've not seen me naked before."

"You'll break the cell!"

"Stop shouting! It's a microbial fuel cell. Urine is easier to get hydrogen from than water. I'm just giving it a kick-start."

"I thought they only took water."

"Nope. Usually they're primed with commercial urine, but if you're in a bind... Come on darling, you're up next. Get your bladder over here."