Check out these enema pants:
"These self flushing enema pants have a hose at the end of the cock sheath from the front to pee in then they attach via hose to the inflatable pump up insertable butt plug to flush you out. This are a new item and made from European Latex. Great for Watersport Play and of course for the Enema lover. Available in size; small, medium, large, extra-large and 2X."