This optical illusion of three women on a bench is confusing everyone

What's wrong with this picture?

It looks like a normal picture of three normal people sitting in a normal park on a normal bench on a normal day, but there's something about this photo that isn't quite right, and it's got everyone scratching their heads. Normally this is where you'd get some spiel about 'Only the smartest 5% of the population even came close to working it out', but it's actually got quite a few people confused. Have a look and see if you can spot the problem:

Photo: Imgur

If you've spotted it already, congratulations! You're in the smartest 5% of the popula- no, no you're not. Sorry. So what's the problem? We'll tell you, but if you're determined to work it out yourself, don't scroll down. Ready? Really ready? Okay then... There's no seat on the bench. Or at least it looks like there's no seat on the bench; unless these women have incredible core strength, it's probably one of those Photoshop jokers having a laugh. Now you know, and the next time you see three women floating on a bench in a park, you'll know it's one of those Photoshop jokers. Photoshopping real life. What a time to be alive.