A buddy, Trey, wrote asking about a trend he's been noticing on his dates. Trey shared that more and more of the guys he takes home to bed want to piss on him before fucking, as opposed to using their piss to spray off the cum and sweat afterward. Trey wondered what's up with all this pre-fuck piss play.
The answer is simple and practical, though most guys likely aren't conscious of why they want to piss first and fuck after. A man's urine is rich with male hormones (which is why so many men cruise each other around toilets — the smells make their dicks hard). When two men fuck in a puddle of piss, they're surrounded by a cloud of evaporating sex signals. Between the erotic aromas and overall juiciness, pissing before fucking makes the mansex more intense.