Franco was Late Show with David Letterman last night when the topic came up of a recent photo he uploaded. The picture featured Franco in his bathroom with his hand down the front of his underwear.
"To me it's just a fun thing. You know, it's something I don't put a lot of thought into," he explained. "But it gets a lot of attention, I have a lot of followers."
After showing the photo of Franco revealing himself, Letterman said, "James, honest to God, why?... I don't care what you do with your underpants."
Franco replied, "It's not like I'm putting on billboards... ostensibly, Instagram is for my fans... it's what the people want!"