"Dude, you're old"

I was at the grocery store the other day buying a bottle of wine. Behind me in line were a couple of scruffy 20-somethings buying a case of beer. When the clerk asked them for their IDs, I asked why I didn't have to provide ID. One of the scruffy beer-buyers turned to me and said, "Dude, no offense, but you're old." The truth hurts.