Testacuzzi
When a man ejaculates into a woman's mouth and forces her to gargle his semen, at this point the man dunks his balls into the woman's mouth thus creating a jacuzzi for his testicles.
Thom: "How's that new girlfriend of yours?"
Greg: "Great man, she even let me relax my balls in a nice Testacuzzi"
Greg: "Great man, she even let me relax my balls in a nice Testacuzzi"