I Really Shouldn't Be So Friendly

Last night, I was in Wal-Mart looking for milk. A gentlemen near me, also looking at milk, made a comment about the outrageous price of this specific dairy product. I made a crack about how it might just be cheaper to buy a cow. That guy must have grew up on a farm because he then proceeded to tell me the process of the who, what, when, where, and why of cow milking. I stood there for about 5-10 minutes listening to this guy's exposition. I just said, "neat" and "cool". Must make mental note, don't make conversation with strangers who grew up on farms.