When I was 21, I met at a girl at a party and talked to her all night. It wasn't a terribly interesting conversation, but I was thrilled with the idea of meeting a stranger at a Brooklyn party that I might date.
A few hours later, she said she had to go and I offered to walk her to the train. She said she was taking a cab but asked if I would wait with her until she got one.
We walked to the street and to the corner, and as she hailed the cab, I asked if I could have her number.
The cab pulled up, and she looked at me and announced, "oh, phones."
She then got in the cab and it drove away.
I still felt pretty good about myself.