Mark showed up at the back door of the club already shaved smooth and wearing the pink panties under his jeans like he'd been ordered. The big guy waiting there didn't say much. He just grabbed Mark by the hair, dragged him into the filthy men's room, and told him to strip. Mark's cock twitched hard the second his clothes hit the piss-stained floor. The guy yanked a tiny black skirt up over Mark's hips, snapped a frilly bra around his chest, and jammed a cheap blonde wig on his head. "You're not a man tonight. You're the toilet sissy slave. Get on your knees by the urinal."
Mark dropped fast. The cold tile bit into his bare knees. The guy unzipped, pulled out a thick cock already half-hard, and let loose a hot stream of piss straight into Mark's open mouth. Mark swallowed like the desperate slut he was, piss running down his chin and soaking the front of the skirt. "Good fucking sissy," the guy growled, shaking the last drops onto Mark's tongue. Then he shoved his cock between Mark's lips and fucked his throat raw until thick ropes of cum joined the piss already in Mark's belly.
The door swung open again. Two more men walked in, laughing when they saw the sissy kneeling there. "New urinal?" one asked. They didn't wait for an answer. Both pulled their cocks out and aimed at Mark's face. Hot piss splashed across his wig, ran into his eyes, and flooded his mouth until he was gulping and choking. When they finished, one of them spun Mark around, bent him over the toilet bowl, and yanked the panties aside. A fat cock slammed straight into Mark's lubed hole without warning. Mark cried out around the second cock that was shoved back into his mouth. The guy behind him fucked like he hated him, pounding deep and hard, balls slapping against Mark's smooth ass. Every thrust pushed Mark forward onto the cock in his throat.
More men kept coming in. Some just used him to piss, holding his head under the stream while he drank every drop. Others fucked his mouth until their cum mixed with the piss already coating his tongue. One guy pulled the skirt up, spanked Mark's ass red, then drove into his hole while another man held Mark's face down in the toilet water. Mark came untouched, his sissy cock spurting into the panties while two strangers used both his holes at once. Cum and piss leaked out of him, running down his thighs in sticky trails.
Hours passed that way.

Mark lost count of how many loads he swallowed and how many cocks stretched his ass. His makeup was ruined, mascara streaking down his face with every splash of piss. His hole felt wrecked and loose, cum dripping out every time someone pulled out. The final guy of the night was the biggest. He made Mark lie on his back inside the stall, legs spread wide, and fucked him slow and deep while pissing inside him. Mark felt the hot flood fill his guts and moaned like the broken toilet whore he'd become. When the guy finished, he left Mark there, hole gaping and leaking, used and dripping on the floor.
Mark stayed on his back for a long minute, breathing hard, body aching in the best way. He knew he'd be back next weekend. The door opened one last time. The first guy returned, looked down at the mess, and smirked. "Clean yourself up, sissy. Your shift's over." Mark crawled to the sink on shaky knees, already hard again at the thought of next time.