When someone who has an extreme case of diarrhoea that when this person excreates with a certain amount of excessive force it ricochets of the bowl and splatters on the persons back is also a common sexual technique amongst mongolian sadists
dddddddddddduuuuuude I so need a shower, i jst had a major case of a stinky splash back. Damn mexican food
putting your finger first into your own anus and then into your companion's nose. (based on the "wet willie" paradigm. popularized by the cartoon show "spongebob squarepants", which consists of putting your finger first into your own mouth and then into your companion's ear)
"Eww! Yuk! Are you try'na pick my NOSE bro? Where's that finger been? In your ASS?"