Printing Press
This sex act requires that you abduct three little girls and strip them naked in your basement. You must then break their knees with a sledgehammer, toss the girls aside, create a mixture of laxatives and your bodily fluids (especially cum and vomit), and let it blend for ten minutes. During these ten minutes, you are to stand a few meters from your desired girl, charge towards her, ram your cock (you can use a spiked dildo, albeit not necessary) up her ass (cunts and mouths are acceptable), and repeat for each girl until the blending finishes. Feed one of the girls your concoction and, with a staple gun, connect the girls' mouths to each other's asses so that they form an endless human centipede. After some time, collect some of their shit and use it to spell out a phrase of your choice. Smear the shit on their faces afterwards and beat off on their backs and faces.