The Stained Shirt

After eating a plate of chicken wings, I’ve got barbecue sauce on my shirt.
No, not the shirt I’m wearing. That one’s clean. I have a big napkin tucked into my shirt covering my tie.
The stains are on a shirt in plastic that I just picked up from the cleaners.
How I got barbecue sauce on that shirt and not the one I’m wearing, I don’t know.
The shirt was clean when I picked it up. I never took it out of the plastic.
I take off my clean shirt, put on the stained one, and all is well.