This happened a few years ago, while I was in university. I was dating a final-year nurse student. She was a mess, and the stress of the final year and residency was getting to her big time, but she was a monster in bed. You take the good with the bad.
To try to take her mind off things, I suggested we could go to the cinema one Tuesday after lunch. Early afternoon screenings are always quieter, and we could get cheaper tickets. University students, you know? So we went.
The film was some kind of Jackie Chan bullshit, but that was fine. We chose a couple of quiet seats, high up in one of the side rows, munched on our popcorn and started making out. We could have waited for the lights to go out, but who has the time for that? Time waits for no man. And neither does pussy.
My ex was not an exhibitionist, but neither was she shy about going for it in public spaces. She was also very sensitive: kissing her next and running my lips from her shoulder to her ear lobe was always guaranteed to get a reaction. Maybe it was the stress coming out or maybe it was just coincidence, but she really got into it, kissing me back passionately. She smelled and tasted of sweet-salty popcorn. She was delicious. So inevitably we quickly started getting handsy.