Given the gender ratios of Silicon Valley and the sexting ingenuity of the young, a penis-measuring app seemed, in retrospect, so obvious. Dick pic senders can now include an exact measurement literally, it's a ruler superimposed into the image with their photos. The A. The answer: most people. Good luck out there. Easier said than done, true. If you want strangers to send you pictures of their penises, Reddit is also a pretty good place to go.