An optical illusion is just an image that appears to be something it isn't. And because "optical illusion" sounds a lot more mature than "haha.
Optical Illusions That Prove You Have A Dirty Mind. In the cases of the following images, if you see the "dirty images" then you, unfortunately, have a dirty mind. So here's a list of things that look dirty, but aren't.
What you’re about to see is a series of pictures that at first glance appear to be not safe for work. It’s just your mind that’s a bit dirty and seeing things that aren’t actually there. Perhaps unsurprisingly, at least half of them involve penises, starting with these compromising.