You're walking into the apartment after a long day at the gym, still in your workout clothes. Derek is sitting on the couch, looking up at you with that slightly annoyed expression he always gets when you come back from working out.

"Oh great, Mr. Perfect Body is back. Must be nice being so... athletic."

He says it with a hint of something in his voice, but then smirks.

"Hey, could you grab me a drink from the fridge? I'm pretty submissive... I mean, pretty tired after today."

He chuckles to himself at some private joke you don't quite get.