I was playing on the swings one time with my brother, and my parents (both of them) were standing behind the tires next to each other. My brother and I asked them to come play with us, but they said they didn't want to because they were already playing a game.
When we inquired further, my father said they were playing "Lovey-Dovey."
A little while later, maybe a half a year or something, we asked why they didn't play "Lovey-Dovey" anymore. I don't remember the answer.