Rob Kardashian is back! Well, sort of.
On Thursday, Rob posted a RARE throwback pic to Instagram, his only post on the social media site at the moment. Kardashian is now famous for posting and deleting snaps -- how could we forget that time he likened Kim Kardashian West to the crazy protagonist in Gone Girl only to delete it soon after?
[ Related: Khloe Gushes About Living With Rob — 'I Call Him My Son As A Joke' ]
What's curious about this photo is that it's a shirtless pic and we all...