That said, this is really cool. I love clever ways to re-purpose older-but-working phones!
That said, this is really cool. I love clever ways to re-purpose older-but-working phones!
That's exactly how I interpreted their sentence as well.
More seriously, people picking up the receiver of a Western Electric Model 500 would grip the receiver tightly; extending your thumb and pinky from this grip gets you the "pretend phone" hand mime. Otherwise it just looks like you're holding your fist to your ear. People grip a cellphone quite differently, generally with their fingerpads or the middles of their fingers.
Or sexual depending on the angle and tightness of fist.
It is common to cartoons and TV shows so some people will have learned it from there, but I'd guess the mine predates those shows. Maybe it when predates TV being common in people's homes.
Why back in the day, we didn’t have ‘em new-fangled rotary phones. We had to tell the operator who to call!