I used to know this lovely lass from New Zealand. Tall, leggy, nerdy, had the accent, the whole nine. Every guy in our friend group was into her.
Anyway one day we're all at a local gathering, oddly enough and me, having established pretty long ago that I don't switch, was relaxing with her on the sofa while other people did their thing in the bedroom. Like I said, she was tall and leggy (as tall as me, and I'm over six foot), so I was basically lounging between her legs with my head resting on her stomach.
We were chatting about something, I forget what, and then she casually shifts a bit and clamps her thighs around my waist, pinning one of my arms. Sensing that she's up to no good, I reach up to tickle her ribs... but she grabs my arm (I have no leverage) and pulls it tight so that my entire side is stretched out with my arm over my head.
Then she reaches over and starts tickling me right at that spot where the ribs end. Deep, knuckle-kneading tickles that make you howl like a horse trapped in a swamp in a kid's movie from the '80s.
And me, being the kind of person who hates making loud noises, subconsciously decides that I can't let anyone else know what's going on so I clamp my mouth shut and start turning beet red as she shows me absolutely zero mercy.
I forget exactly how long I was stuck there - time tends to blur - but eventually she let me go. And in that fleeting instant, even though it's not really my thing... I understood why the guys who like getting dominated by lady wrestlers pay such a pretty penny for the opportunity.