I had a crush on someone and wanted to hear their voice, so I drove to a phone booth, dialled their number, and hung up when they answered. It was right when people started having call display on their landlines and I didn't want him to know it was me. I thought a phone booth would make it more anonymous.
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Then I got worried he would still see the phone booth number and track it down and realise it was me, by proximity.
I'm embarrassed to say I was in my 20's at the time lol.
Ohmy yes I remember how girls did that. Boys too. The first coin didn't drop until connection was established, it was even time to hear the 'hello' before the coinless connection was cancelled. My group of preteens was actually planning to wire up our own telephone system, but ofc we never got wires for it.