Euphemisms are funny. Instead of saying, "I'm going to the bathroom" I like saying, "I'm going to the Bank." Think about it. You make a deposit. Sometimes you need a receipt. Deposit is an odd word, historically. It comes from a latin gerund meaning "tucked-away thing." It generally referred to feces. The word in latin is 'depositum.' So, there is another connection. I hate it when people say, "I'm gonna go take crap." They don't take anything. Its bothersome.
In "A Grinch Night" the characters all call the bathroom the "euphemism."