Plenty of research shows that exercise helps you be more creative, and never has this been more thoroughly proven than with Claire Wykoff's Nike+ penis art.
The San Francisco woman uses the activity tracking app to run in the shapes of elaborate (sometimes risque) pictures, including a Space Invaders alien, a stripper on a pole, an extended middle finger, and a corgi—but her most popular drawings so far are of male genitalia. As they should be.
Wykoff's Nike+ art basically justifies the invention of smartphone apps, and is a brilliant motivator to get out there and run already so you can show off your best lewd creations on social media.
See more of Wykoff's imaginative sketches at runningdrawing.tumblr.com.