SPOILER.....
In truth, Grayson isn't evil... but he's not a normal person. He has alexithymia—meaning he can't understand his own emotions or those of others. Everything he did for Chase, in his mind, was to help him release pheromones, not to go insane. However distorted his mind may be, he's the only one who cares about Chase.
"i wouldn't fuck a dog but my brother def sure can cuz hole is a hole but def not for me" bro get Urslef fucking treated
Welp just because bros got a disorder doesn't excuse him playing psychological warfare shenanigans on his brother and deeply traumatizing him. What's the point of having good intentions if you do batshit things to reach that goal.
Anw, is it confirmed that he actually has that kind of illness. Kinda feels like a gross misrepresentation of it.
If you're not a normal person, what seems repulsive to us seems normal in the mind of a madman. You'll understand Grayson better by reading "Desire Me If You Can." There, it's explicitly stated that Grayson doesn't understand his own emotions or those of other people. This only begins to change when he meets Dane.
What's not wrong with grayson