On the "Ferris wheel"

Blinking, you come to. You can't see anything, and it takes a moment before you register that you're blindfolded. You're upside down, hanging from the wheel by your feet, with your hands tied behind your back.

"What's going on?" you want to ask, but there's a ball gag in your mouth, and it comes out sounding like "uhh eeehh uugghh". You hear someone laughing and, shuddering, you realize that whoever did this is in the room with you.

You're wearing a leather collar around your neck, and it makes it difficult to breathe. Strangely enough, all this seems to turn you on. 'No'! You think, I'm NOT a bitch! I'm an alpha male! 'None of this was ever supposed to happen'. But your dick betrays you. Harder than it was ever in your life, it's obvious that you're loving this.

Suddenly you feel something being slipped over your balls. 'Oh no oh no oh no', you can guess what's next. You can feel a woman's fingers pulling a thin rope TIGHT, trapping your balls before looping it around each nut a few times to separate them. Then, she yanks it up. Hard. Without even thinking, you bend your knees to relieve the stress on your balls.

Big mistake, you realize, as she ties the end of the cord to the bar you're hanging from. She bends down to whisper naughtily in your ear "this cord around your balls is tied with a tautline hitch knot, you know what that means ****?" She doesn't wait for you to acknowledge she said something. "It means that the knot can be tightened without retying it".

In the position you're in-hanging from your feet with your knees slightly bent-there's a ton of pressure on your knees. The only way to lessen it would be to straighten them, but since the line to your balls is taut, doing that would put your entire body weight on your unprotected nuts.

And that's not the worst. She'll probably keep on tightening it, slowly increasing the amount of effort required to keep the pressure off of your balls. And your knees are already getting tired fast. 'At least she can't make it worse' you think before she proceeds to do exactly that.