Custom: You do a slow striptease and eventually take your panties off exposing your butt. The catch...you do a series of FALSE countdowns (teasing like you're about to expose your butt and reach "1") where you MUST cum at only "1" with your buttocks fully exposed. If cumming starts before hitting "1" all contact must stop=RUINED ORGASM and the end of the session=try again in 1 week. Eventually you do hit "1" and expose your bum...but after a series of failed "blue, ruined" attempts.