There are people out there who somehow don't appreciate the delicate art of photographing your junk, which is probably because a lot of people don't think too highly of grainy, poorly lit and all too often unsolicited shots of penises.
I'm sure there's an artist with a neck tattoo sitting in a loft in Queens making a dick pic out of bunch of smaller dick pics, but I doubt that crowning achievement in irony would do much to legitimize an admittedly overdone practice.
However, if you insist on sending someone a picture of your genitals, you should at least know the dos and don'ts -- if you skipped that day in health class, one girl was kind enough to put together a tutorial on Snapchat (naturally).
Before you ask: I don't know what happened to Technique Four. We probably shouldn't talk about it.