When I was about 12, a friend and I played this strange game, which was basically classroom role-play. When one of us got something wrong (hmm, fairly frequently) the "teacher" would have the right to spank the "pupil". We would then run to the toilet together and compare the scarlet slap marks on our bums. It was meant to be funny, or an exercise in how much pain you could tolerate, but it was also so naughty
My other young memory involved a butch lesbian at secondary school. I was in my final year (about 16, but still inexperienced/clueless etc) and she was two academic years younger than me. She was the first young butch lesbian I'd seen, and she had this whole beautiful reckless f*ck-the-world thing going on, and I was hugely attracted to her. I was pretending to be straight at this point, and was a very serious teen. She was so different, not punkish or gothic, or aimless or a loser, just strong, tall, clean, rebellious butch. And I wanted her so, so badly. I caught her looking at my chest a couple of times in the lunch queue, and I knew a friend of hers, so I'd waltz over and pretend to be sophisticated for two minutes or so, and then escape, a little breathless and embarrassed. But I never plucked up the courage to speak to her directly, so it never went any further.