Andrew Quitmeyer doesn't take himself very seriously, but dogs take him VERY seriously.

Mark Your Territory - Check Into Foursquare by Peeing

https://www.youtube.com/watch?v=rRdfeb7vDWg

https://github.com/quitmeyer/Mark-Your-Territory---Pee-to-Ch...

https://www.instructables.com/Pee-to-Check-In-to-Foursquare-...

https://popupcity.net/insights/pee-to-check-in-to-foursquare...