Congeniality
That's certainly a way to put it.
Next time I'm in an airplane lavatory, I'm gonna check it out just to see how much space IS available.
Have you ever stepped into an elevator or walked past someone where you blush and your hormones shoot through the roof for 30 seconds?
What IS that?
I can see how two creative, sexy people in a rarefied atmosphere in the middle of the night could go for it.