Imagine that guy, before that night, grappling with his sexuality and unable to figure himself out. Finally, he comes to the conclusion that he is ok with his sexual fluidity and tells his boys who are psyched for him having found peace of mind. They go out to celebrate. Then......he meets your friend
Him - "Hey guys...GUYS...listen. Forget what I said before, it's nothing but dudes for me from now on."
The guys - "What? We've been here a grand total of ten minutes. What happened?"
Him - "Nothin'....it's just....when you know, you know"
The guys - "We're not buying you another cake"
Him - "there's a cake?"
The guys - "yeah, it's a coming out cake....the baker said that's a thing.....it is a thing right?"
Him - "sure, why not"