I got to thinking about the first (and really only) time I deliberately set out to seduce a gal by using exhibitionism.
I was in university, and she was in one of my lectures. At the time she hung around with this guy, they'd meet after our lecture (he wasn't in that course) and sit out on the grass at lunchtime chatting. It was a little grassy section away from the main part of campus, with bushes around. Not too many people went there. They never kissed or were physical with each other, except in a friendly, pal-like way. I noticed over a period of time that she was looking at me rather a lot, so I decided to go for it, building up over a period of time.
First of all I wore a pair of tight jeans where I had a rip in the crotch. It was quite small, but if I lay half reclined on the grass with one leg propped up, bent at the knee, I could place myself so she was staring right at my crotch....her boyfriend's back was to me, she was facing. At first I wore panties - red - and just lay there reading. I did that for a couple of days, then started slowly stroking myself in that area.
By the end of the first week, I was no longer wearing panties, and I was quite openly masturbating when I could.