Back in high school, my girlfriend and I were really into some pretty kinky stuff. She was Mormon, and didn't want to have sex before marriage, but she was pretty cool about everything else. I mean, looking back on it, she was such a tease, but I didn't care.
One game we did was called 'Lotion.' She used to have this really slippery hand lotion, and right after sixth period class on a Friday, we'd go to the rest room, and put it down our pants. So, imagine spending the last period of class during the day with your dick hard in slippery lotion. We couldn't use too much, or it would show through our clothes and I'd smell kind of flowery, but we used enough to get ourselves aroused in English Lit. By the end of seventh period, we were really randy. We'd walk home to her house, our thighs and loins slipping around in our knickers, and make out behind her garden shed, rubbing each other through our clothes until we came. It was incredible.
Another thing we did was she'd take off her bra, get her shirt soaking wet, and I'd suck out the moisture from around her hard, dark nipples which she jilled off. She really liked the slurping noises, and the noisier I sucked, the harder she came.
Sometimes, she'd tie me down (not very well, but that wasn't the point), and masterbate right next to me as she described softly in my ear how she felt from arousal to orgasm. Sometimes she'd make up fantasies about being tied down, being soaking wet, or something really sexy. She took requests, too. Sometimes she'd finish me off and sometimes she wanted me to tie her down and describe my masterbating to her.
A few times, she passed notes to me in class, describing lurid and sexual details about her feelings or fantasies, but we stopped when she was caught one day.
One night, we were at a friend's house. They had a pool that they drained in the winter, so in late spring, they'd fill it up again from the garden hose. One night, my girlfriend suggested we sneak into their pool (they were away for the weekend), and skinny dip. I was totally for that. At some point, she took the garden hose, turned it on, and put it up between her legs as she stood at the shallow end. She found heaven, because she came at least five or six times on the first round. Then she tried it on me, and I wasn't so keen because the water was really cold. So then she made me do myself while she did herself with the hose. She was so weak after ten or twelve cums that she didn't have the strength to get out of the pool for a while, so we just floated together in post-mastabatory bliss, looking at what few stars we could see with all the city light pollution.