Challenge

To my friend.

Alex was a girl and John was a boy. Alex played baseball and John played guitar. Alex got good grades and John flunked. Alex wasn't going to go to that party. John was.

You'd expect that two people who live on the same street and go to the same school would know of each-other's existence, but Alex and John didn't. That is, they didn't until a party that they both happened to attend. Then they couldn't get rid of each-other.