Joke from an unknown source

I got this joke in an email from a friend. It definitely deserves to be shared.

I had ambitions of finding a simple, uncomplicated part-time job after finally retiring from my 'day job' after all of those years. So after landing my new job as a Walmart greeter, a good find for many retirees, I lasted less than a day.

About two hours into my first day on the job a very loud, unattractive, mean-acting woman walked into the store with her two kids, yelling obscenities at them all the way through the entrance. As I had been so instructed, I said pleasantly, 'Good morning, and welcome to Wal-Mart. Nice children you have there. Are they twins?' The ugly woman stopped yelling at the kids long enough to say, 'Hell no, they ain't twins. The oldest one's 9, and the other one's 7. Why the hell would you think they're twins? Are you blind, or just plain ass stupid?' So I politely replied, 'I'm neither blind nor stupid, Ma'am; I just couldn't believe you actually got laid twice! Have a good day and thank you for shopping at Wal-Mart.'

My supervisor said I probably wasn't cut out for this line of work.......