One of the most common photos you’ll see on Instagram or Facebook is the infamous “legs on the beach” shot.

You know what we're talking about -- A girl is lying by the water in a bikini and takes a picture of the water with just her bent legs in the shot. What you probably didn’t realize about those pictures is how much their legs resemble hot dogs.

It may sound ridiculous, but a Tumblr account simply called Hot Dog Legs has everyone second-guessing those vacation pics and making us wonder if we’re actually looking at a couple of jumbo beef franks.

You may think it’s simple to distinguish between the two, but it’s much tougher than you’d think. See if you can tell which ones are hot dogs and which ones are legs.

Hot Dogs or Legs
Hot Dogs Legs
Hot Dogs or Legs
Hot Dogs or Legs
Hot Dogs or Legs
Hot Dogs or Legs
Hot Dogs or Legs
Hot Dogs or Legs
Hot Dogs or Legs
Hot Dogs or Legs
Hot Dogs or Legs