Hay /d/, let's compile a list of hentai movies with watersports scenes in 'em. I'll start:Shoyonoido MakocchanBody Transfer Ep 1Co-ed Affairs (3 of 'em!)Imouto JuiceServant Princess Ep 1+2Sin Sorority Ep 2 (short and crappy)ImmoralityNow you go.
ehm, there is no single drop of pee in ImmoralityBut I can also add a hentai film to this list:Living Sex Toy Delivery / Nikuyoku Gangu Takuhainin Ep 3
Um Magical Canan has a couple of seens, and does cool devices
Bondage 101 / Choubatsu YobikouI only watched EP 1 yet.
Midnight Sleazy TrainAnd this gif is from Angel Blade
I think some guy urinates inside the main character at some point in Immorality.