Reminds me of an old girlfriend I used to have. We used to play "diaper" and I'd have her piss just when I was cumming in her. God, the sensation of all that hot liquid running down your balls made me cum so hard I would see stars. We usually did this on a towel with her sitting on the bathroom counter so when she pissed, it would run down over my balls due to gravity. Man, she was a great fuck!