When Finn wakes up Poe knows that everyone on base is going to immediately try and jump on his dick because a) he's a hero and b) have you met him? So, to give Finn at least a couple of of days of semi-normalcy before that happens he maybe sort of implies that they're dating (to Snap, so now everybody knows). At least, that's what he's going to tell Finn when he asks. Poe is definitely going to put a stop to it any day now.

+ And then Rey comes back, and she's fresh off Jakku and doesn't need these hounddogs after her. He's doing her a favour, really...
++ Finn: not actually a clueless virgin, about three steps ahead of Poe on this "plan".