Don't get me wrong... i love when someone is big and soft and squishy but omg - when someone's scrawny + has been holding their pee, so they're all swollen and you can SEE how fucking strained it is
faint veins sticking out, running up from their cock as it rests on bulging bladder, unable to get hard because they have to piss so fucking bad it's hurting.
Sure, they tug it a few times, but it just rests right back on the curve of their lower belly anyway, a sharp contrast to how bony the rest of them is, an almost gruesome round swell amongst a body lacking much fat or muscle.
You can almost feel how much they must be aching