"If you're getting on your knees in the latrine I would say you are paying for your drinks." May not be in cash but it wasn't a free blowjob, either.

"I do hope Raylan isn't charging any latrine action for these, or I might be missing out," Doc jests as he lifts up a glass of moonshine before drinking it. Some might have called him opportunistic but the hangover is costly enough that Doc wouldn't charge for the drinks on top of.