Mid twenties happily married Steve and Nancy are pretty frequent guests at their neighbourhood’s key party. So are Argyle/Eden, and Jonathan/OFC, and whoever else you want to toss in. Feel free to write in tiny crossovers to other ships you ship.

One day a new couple, Eddie and Chrissy, attend. They're obvious newbs, for all their fake it til you make it attitude. Steve and Nancy take them under the wing for the social part of the night. Then it comes to picking keys. Women are supposed to put their keys in, while the men choose at random. But since Eddie and Chrissy are new, they didn’t do that right. Steve takes a key, and bisexual and excited to fool around Eddie comes over.

Nine times out of ten Steve would just calmly explain the error, and introduce himself to Chrissy. But Eddie is cute, and funny, and Steve’s always been the slightest bit curious. He decides to take Eddie home.

Meanwhile, Chrissy is picking a key when she shouldn’t. Heather gets picked, and has the same base decision of always moderately bi and genuinely cool with the idea of taking a girl home tonight.

Everyone has a great slutty time, and the real couples happily debrief the next morning.