San Francisco Science Fair

When two dudes get together to have sex, but one fills his asshole with vinegar, and the other covers his dick in baking soda. Upon insertion the baking soda and vinegar will react creating an ass volcano.

"From what I've heard, Kyle and Jake are super gay for eachother"
"They are! I heard they got a 14 inch toy and they've also experimented with the San Francisco Science Fair"