Butt Dial

Even though the experiment was a success, Bell and Watson needed to perfect the telephone device before heading to the patent office.
Some of their ideas were improvements on the original concept and others weren’t.
For instance, Watson rigged up a chair to the telephone that would call the other unit when someone sat down.
“Call someone else with your butt?” said Bell. “How brilliant and simple!”
After sitting down to think and calling each other over and over, they decided not to add the feature.
But today, it’s standard with cell phones.
Just put it in your back pocket.