1) The disease a person may contract while having sex on an airplane. It comes from exposing your genitals around the high density of methane.
2) The direction the toilet swirls down the drain in Australia.
1) Marlyn joined the mile-high club on the trip to Phoenix, but three weeks later she discovered Muffin Top Doyle on her labia majora. It required laser surgery to remove the cyst.
2) Joey was so interested in the Muffin Top Doyle when he was done with his dump that he inadvertently produced some Dingoberries. Fortunately the tour guide was experienced with his outback.