If you see a couple having sex, you’re probably an adult. If you see nine black dolphins swirling around in a bottle, you’re probably a child. This double image illusion has been used by psychologists to talk about memory, experience, and maturity in children. Apparently most children see the dolphins because they don’t have a memory for the image of sex. What about well-versed adults? Well, if you can’t even see the dolphins, you might need to spend a bit more time at Sea World and a bit less in the sack.
Image via Reddit.