note-missionary position recommended_1
It consists of the following - upon achieving full penetration of the victim's slotch, the performer reaches through his own ass gap from behind and CAREFULLY places his thumb behind whichever nut he considers to be the most expendable and pushes it, as quickly as is expedient, into the victim's bungwhistle. The true danger is now at hand, for the possibility of sudden and ruinous butthole contraction is ever-present. The mark of the true potato-master is the ability to elicit moans of joy, rather than screams of pain or expulsions of gas, by using this technique. Use of lubrication is advised unless victim has sufficiently pustulent ass-herpes.