tubing with 3 or more matching tubes, where tricks are pulled by seasonedprofessionals :-) such as, triple barrel rolls, quadhops, and jumps that clear over 10 feet.
google schloobing, or search for it on youtube. A guy who went schloobing only about 3 weeks ago put together a pretty amazing video of it. Another one to come soon.
The aim of the participant is to reach point of ejaculation at the same point in time that the faeces are exiting the anus which will supposedly result in a higher amount of pleasure being experienced than with a conventional orgasm.