For those who like masturbating face-to-face (watching each other), back-to-back (listening to one another), or together over the phone or the Internet-if you want a simultaneous orgasm, try this simple trick:
Count down alternately from 10-9-8-....to....CUM! You start by saying 'ten'. Wait until the other says 'nine'. Then you go 'eight'. And so on. This way, you'll know how far or close you both are from cumming, and you can adjust your speed to one another.
It's simple and remarkably accurate. It doesn't interfere with any other talking/cybersexing you're doing. And it usually makes for a great liberating laugh! Whoosh!