for a show with lots of weird vegetation and shit floating in the air, there aren't nearly enough sex pollen fics so,,

after escaping the bats but before they find the gate in eddie's trailer, the four of them (or just one from each pairing if you wanna go that direction) get blasted with sex pollen. up to you if they make back to the real world before the effects kick in or it they're going at it while still in the upside down.

+bonus points if steve and nancy are still somewhat oblivious to their own attraction to the same gender during it and are trying to justify it to themselves (something along the lines of steve wanting to protect robin from having sex with a man and nancy thinking 'well maybe it isn't really sex it's just two friends helping each other out')