The *almost* refers more to the activities than the altitude.
I fly a lot for work. Nowadays I don’t socialize much on flights, but early in my career I was still very enthusiastic and would gladly spend time chatting with my seat neighbors.
About a decade ago, I was on my way back from Europe- I think it was a Paris-Seattle. I was on a window seat on the left side, or a three seats cluster (important detail for later).
My neighbor was a cute girl in her late 20s/early 30s. Shoulder-length dark hair, beautiful eyelashes, only very slightly overweight, with a fluffy sweater-clad generous chest and light gray legging. She only had the most basic makeup, she clearly wasn’t trying to attract any attention.
We started chatting almost immediately. She was coming back home after some time in Europe as part of her PhD. Exceptionally smart, amazing sense of humor, contagious laughter and that special way of keeping the gaze focused a bit longer than normal, that makes you wonder- what if..?