Seattle Science Fair

Two men anally gape a woman until the her anal cavity can contain 150mL. The men will scoop out the excrement of the women with wooden spoons in order to create a basin. Then, the men will pour 50mL of vinegar and then 50mL baking soda. The men will plug their penises into the basin in order to contain the reaction. After they ejaculate, they unplug and let the anal-volcano erupt.