"Brittany wakes up a guy. She's pretty much okay with this. And then she remembers what a good boyfriend Kurt was, and that he's clearly lonely, but capital G Gay. So she decides to do him a favor (not that she won't be having fun, too). Oh, and Kurt knows it's a temporarily male Brittany, instead of a random guy. Because it would never occur to her to lie, or even think of waking up a different gender as an oddity."