That looks like a.....

...penis. Yes, I have a penis on my arm. In blue surgical ink.

Now, you might ask how one goes about getting a temporary tattoo of a penis on her arm. Well, it's rather simple-- just get a bug bite, make sure it gets infected and turns to cellulitis. I guess it's by pure chance that the outline the dr at the urgent care clinic did resembles something so phallic on my arm, but of course the key is to have co-workers who notice it, have no qualms about pointing out what it looks like and jump at the opportunity to add a few more realistic touches to the drawing (which fortunately came off with a good scrubbing of alcohol...rubbing, not drinking)

It almost reminds me of the ending to that one Austin Powers movie where everyone watches the space ship fly off.... "That looks like a big..." "Johnson!".