Because that would imply that Brad was also flipping back and forth. If you want a story like that I believe apocalypsos wrote one for Sam/Dean.

Also, yeah, poor Nate. He's been turning into a girl since he was thirteen and he's like 21 now. If he couldn't accept it I should be sad for him.

Also, also, all you have to do is win Brad over by being useful. Useful people are like Brad's favorite thing in the entire world. Thank you so much for reading!