I don't know if this counts as a story or a technique but I'll post it as a technique.
The other night, my wife bought one of those hair color kits. They come with these little tubes of conditioner that feel great when you're masturbating, just a few drops of water and it feels absolutely silky.
I went in the bathroom take a shower after she had colored her hair and I stood in front of the sink masturbating with the conditioner when I noticed the latex gloves that come with the kit. Adding a bit more lube I slipped my cock into the glove...it felt ok but it was still missing something. That's when I wrapped my towel up onto a tight 'C' and placing my gloved cock inside. I put the whole thing on the bathroom counter and holding it down, proceded to fuck it. Immediately my head began to swim with pleasure. Looking in the mirror I could see the head of my penis peeking out from the towel with each stroke. I had to stop a couple of times to adjust the glove but it didn't take long to have an explosive oragasm filling the index finger with my cum.
It was just a simple matter of turning the glove inside out to clean it, and I took quite a few showers until my wife finally threw away the gloves. I can hardly wait til her roots start to show again.