Maybe there could be small vibrators in it, so you can actually "feel" if it's close to cumming, and the closer it gets, the vibrations get more intense until it starts shooting its load, which you can feel with a heavy throbbing ...

Awesome idea! Would love if it cums and precums automatically, giving you the sensation of real sex. Could be great for some risky "dont cum inside me" and "pull of before it cums" plays. ;) ;) Maybe the toys could have some form of sensor, so if you fuck it really hard and or fa...