from www.tmz.com – Sen. John McCain’s voyage into the world of new technology hit a snag … when a self-pic he posted on Twitter recently popped up (so to speak) on a notorious gay porn website.

The “Maverick” was just tryin’ to show the world that he could take a pic of himself on his iPhone — when somebody ripped the image from his Twitter page and posted it on “Guys with iPhones” — a website featuring men clutching their phones … and often themselves.

But McCain’s press secretary wants everyone to know, the Senator is definitely not responsible for uploading his face next to all those heads … telling us John “did not post on said website.”

McCain’s rep added, “As I’m sure you are aware, once something is posted [on the Internet] we no longer have control of how the photo is used.”