Twinning

The controversial pastime of twins, separated at birth, who upon being reunited as adults get overly rambunctious and find their reunion goes a little too far.

"Daisy, it must be nice to be reunited with your twin, what have you two been up to all summer?"
"Oh, just ... twinning."
"... ... oh. Oh my."

Nasty Butler

Sex in a public place, where one of the participants is wearing a suit and tie.

"Tompkins! Give me some Nasty Butler."
"In the vegetable aisle, madam? Certainly. Right away HNNNG"