Following on from MyAuntFanny.....
Take a piss - "Point Percy at the Porcelain"
Throw up in toilet - "Talking to god on the big white telephone"
Defecating - "dropping the kids off at the pool", "One stuck in the departure lounge" or "Going to release a Chocolate Hostage" or after a very hot curry.. "pebble dashing the loo", "Squirting like a blood orange"
Masturbation (Can I say that here?) Male:"Shaking hot white coconuts from the veiny love tree", "Indulging in the pleasures of the palm", "Owninism", "Bashing the Bishop", "Choking the Chicken", "Stroking the One Eyed snake"
Female: "The KitKat Shuffle", "tapping the tuppence"... Why so many for men, not women ???
Menstrual Cycle - "On the blob", "Painter and decorators are in", "Arsenal is playing at home (the red flag is flying)"
Making Love - "Shagging", "Horizontal Mumba", "Horizontal Jogging", "Boffing", "Doing the Doo", "a bit of How's yer Father"
I did warn you guys about my sense of humour!!!!!!