I'm Not Grumpy, It's Just Gravity

I am thinking of getting a t-shirt with that slogan on it. This way, if I am not smiling all of the time, people will understand that what looks like a frown is really just gravity at work. Or maybe I could put the slogan on a button so I could wear it on different outfits, because the t-shirt might require too much in the laundry department, and then I would have a real reason to frown.

Let me know what you think of my slogan and if you prefer the t-shirt, button, or maybe a hat.