Matt Andrews enjoys taking advantage of advertisements with personal phone numbers in harmless-but-humorous ways. His text exchange with an iPhone repairman, which he shared on his site Textastrophe, certainly fulfills both these categories, unless you end up finding the NSFW image an offensive sight (it's not that bad, but it's also not the most attractive picture). Here's the banal ad Andrews responded to:
Andrews's conversation with poor Jonathan starts out simply enough, then gets interesting. Heads up, there's a mildly NSFW image below.
The funniest part of this isn't even the less-than-witty ass-crack joke. It's the aftermath. One can clearly see both parties simultaneously reacting: the phone guy shaking his head in frustration, and Andrews sniggering away. Stay young, Andrews.