" Karla’s face heated. “It, um, means to have sex with someone. We humans have a lot of euphemisms for sexual intercourse.”
He appeared intrigued. “Is that so?”
“Oh, yes. Um, let’s see here,” she said in a thoughtful tone. “There’s grinding the corn. Hitting a home run. Knocking boots. Peeling the banana. Making whoopee. And my personal favorite, the matrimonial polka. "

― Sue Mercury , Alien Warrior's Second Chance (Vaxxlian Matchmakers #4)