Image by Jean Scheijen
Here are all the facts, experiences, techniques and media/links we have on:

Metronome

With contributions by SOK123, histochem. - Thanks!

A device used to keep your mind at a constant tempo.

Milovanian thoughts

I use metronomes  to pace my masturbation. They can be programmed to speed up or slow down the stroke pace or to just stop for a few missed strokes.