That’s interesting! Although not the same thing, I remember in grade school a few different occasions with different teachers and my peers. In one way or another it was made clear that I shouldn’t hang out some of my friends based on the color of their skin. It was really sad and I was so young too all I could think was “why on earth would I not hang out with said person, I like them?” In one instance, it was a new girl who didn’t speak much English and she didn’t have any friends so I hung out with her and my friends made fun of me. It’s terrible that discrimination, racism and sexism is “taught” to kids by these sorts of social behaviors.