Start fucking yourself faster. Set the metronome to 72.
Grab your balls and start playing with them really, really hard.
Squeeze them, twist them. Don't go easy on yourself. I hope your clitty is throbbing in that tiny cage.
Go like that for 1 minute.
Good girl.
Now set the metronome to 84. And keeping ass fucking yourself for another minute.
Now set it to 112 and go for 30 more seconds. In and out, in and out.
Doesn't that feel great, oh of course it does!