When we’re young, we’re taught by society that boys are supposed to enjoy masculine things only and vice versa. We are expected to follow such gender stereotypes throughout our lives without exceptions. Therefore, when someone encounters a man who likes My Little Pony, they may assume that there is something wrong with him and they might feel that he is a threat to their worldview of toxic masculinity. Their natural reaction is to attack them and attempt to get them to embrace traditional gender roles again.