8 XXX : Bondage

That's a good variation. Subs always start to writhe after the 3rd or 4th orgasm as they loose sensibility - even if they try not to. Then the wand moves out of position. Although ... it is fun to re-affix everything, because they groan like crazy. It reenforces the feeling of inescapability. I'll try this version. It seems like it needs a large rigid dildo for between the feet to prevent it all moving. Hmm. I might make a wooden device for that.
/r/forcedorgasms
Nothing like a great edge session ending with a forced orgasm. Seriously, that's a great way to spend a night.