This is assuming being gay is purely sexual, which, despite being called a sexual orientation, is misguided. There is more to attraction than sex, such as who you imagine you could be in a relationship with, who you develop feelings for, and who you love. In other words, while one may be aroused by certain sexual activities (kinks), no one develops a crush on someone because of a specific sexual activity.

Being gay isn't a kink, just as being straight isn't.

Straight people continued relationships despite being outlawed, which is the entire premise of Romeo and Juliet. Would you call Romeo and Juliet's relationship a kink?