Anal Leap (1991)

Buck Adams is a time traveler, who, due to a mishap with his time machine, somehow connected to a toilet, is bounced from one time period to the next. It seems that whenever someone in another realm flushes the toilet, Adams finds himself being whisked away to another time, and the arms of another wanting woman. The ticking clock for Adams: will he have enough time with each babe before the next flush.