Memory Is The Second Thing To Go

So on my way out to lunch I stop by the restroom before I hit the elevator.  After my brief stop, I get on the elevator and a woman I know from around the building gets on with me.  We smile at each other, say hello, and start the trip down when she laughs and says, “Oops, you better zip-up, the horse is going to run out of the barn.”   I look down, and naturally embarrassed, zip-up my fly and reply, “Eh, at my age the horse doesn’t run out unless the barn is on fire.”