See also deep sea snorkelling
Timmy: Well Mr. Testy, last night my girlfriend and I were horny, but she had to take a poop, so to save time, I had sex with her while she was pooping. It's called a snorkel sir.
Mr. Testy: Ah, a snorkel, brilliant!
Lisa: Hell yeah I did SON. SNORKELED SO HARD I THOUGHT I WAS TEN FEET UNDER
John from marketing: word