Spike your girls drinks with strong laxatives. Then provide to have snap sex, she will try to squirm away to get to the toilet but pull her down as she begins
to shit on your dick. Once you feel shit on tour dick, grab her by her hair and her feet and bend her in a position so her ass is facing in the direction of
something/someone you want to cover in shit. Proceed to violently shake her until she begins to spray shit
everywhere.