"Just remember that a sling has been *done*, people."

I have always thought about a stainless steel device that I could climb into naked. It would have multple degrees of freedom similar to desk lamps which you can move the bulb to a specific spot and it stays there. Insteed of a bulb. a platform with my fuckhole at just the right position and angle for a top of any height could just slide in and fuck. And after done he could just gently push the platform to the next stiff top. It would be pretty tough to design because of weight problem in keeping the platform steady. Just a scifi powerbottom daydream!
best regards,
pete