Anniversary

This is the conversation I heard this afternoon, between two mid-aged men.

A: (Checking watch) I'm going to leave now. I need to pick up my wife. Today is our Anniversary.
B: Oh, that is interesting. Today is my anniversary too. But I got divorced, so ...
A: Oh yeah? You know what, today is my anniversary with my second wife.

I could hardly hear anything through my laughter after that.