Fake Stata tattoo
We use the statistical software package known as Stata for our calculations. I'm a big fan.
A few weeks ago I sent an e-mail to Stata's marketing folks that they should get "Stata" temporary tattoos and toss them in with purchases -- just to spread the word.
They wrote me a lovely (handwritten!) letter, thanking me for the idea -- and included a few prototypes.
I wouldn't really get a Stata tattoo. Probably. ;)