It's the oldest gay story in the book.
Two guy best friends, both 'straight' to the other, have a drunken fumble and realise they have deeper feelings than they realised.
Well, maybe it's not the oldest story, but it's definitely a good one.
This happened to two guys in Georgia, and it all developed over Yik Yak.
The app, much like Whisper, allows people to share their secrets anonymously with strangers according to their location.