When two girls scissor and one girls vaginal area migrates back towards the anal area of the other scissor-ess, and that girl then flatulates into the vagina of the former scissor-er. Then the two finish and then the girl containing the methane in the uterus then releases with such great force that it shakes the bed.
Other variations include a lighter being used to ignite the said methane. If there is an accident that occurs, such as pube flambe
, please consult your doctor.
So the other night, my girlfriend farted in my pussy... That was a weird quief; it sounded like The Everett.