Attention!

Two guys are talking one day. The conversation was about paying attention. Here it goes:

Guy 1: I was talking to my friends about why people don't pay attention to each other.

Guy 2: Really? How long did you talk for?

Guy 1: Oh, a couple minutes. It was a good conversation.

Guy 2: What did they say?

Guy 1: I don't know. I wasn't paying attention.