That hurts my brain. 

 Mine too until I proved it for myself 🤣🤣 

 What's the trick? 

 Just an optical illusion. Here’s the same image with a bar of color connecting the faces 
https://m.primal.net/MbfY.jpg 

 That’s just ridiculous… my eyes just can’t believe it. 

 yup. #7d7d7d for both. wild 

 Subjectivity of color perception is based on many, many factors, including the context with other colors. Fascinating!! 

 💯 even once I see it proven I still see the different colors 🤣

https://m.primal.net/MbfY.jpg 

 Oldie but goldies are best: Shepard tables https://nostrcheck.me/media/6fd3915a55ad0c2eae64e2b818acbbae9c6b3d9b5ee44e19aa040fb09f0d3cdd/08a4c4c21968b6e37c75adcf95f75c40a5ba77d08445328c03f311669078a4c6.webp
 

 For white gray is black, for black gray is white 

 You and your socialist optical illusions (just kidding) 

 Fuck right off