Michelangelo whimpers.

"Keep the ice on it, Mikey," Leonardo says patiently, gently pushing the cold pack against Mikey's swollen lip.

"It's cold and my mouth hurts," Michelangelo whines.

"What did you think would happen?" Leo asks, with the slightly exasperated air of an older brother explaining something for the umpteenth time.

Donatello walks into the room, stopping short when he sees Michelangelo's tear-streaked face and Leonardo's protective posture.

"What's going on here?' he questions slowly, taking in the scene. Donnie crosses to the couch and sits on Mikey's other side. "Mike? Are you okay?"

"Hurts," is all Michelangelo says.

"No kidding," Donatello replies lightly. He turns to Leo, hoping for a real explanation.

Without preamble, "He tried to kiss Raph."

Donatello blinks. He isn't expecting that answer. "Want to run that by me again please?" Polite as always.

"He tried to kiss Raph," Leo repeats, slower this time as if Donatello lacks basic listening comprehension skills. "And Raph decked him."

"He was standing under mistletoe!" Michelangelo interjects, feeling the need to justify his actions before his skeptical brothers.

"So you kissed him?" Donatello raises an eye ridge.

"What choice did I have? That's what you're supposed to do when someone stands under mistletoe, isn't it?" Mikey turns to Leo for confirmation.

Leo nods, but before he can say anything, Donnie giggles and says in his high pitched voice that always gives away when he's trying not to laugh, "That's the tradition yes, but you aren't obligated to kiss anyone and everyone who happens to stand underneath the mistletoe!"

Michelangelo's blue eyes grow wide in sudden understanding. Leonardo begins to laugh as well. "Where did we even get mistletoe?" he asks between chuckles.

"Raph put it up in one of his decorating sprees," Mikey mutters, clearly embarrassed by his faux pas.

"And Raph is going to take it down!" Raphael shouts as he strolls into the room. "All you nutballs ruining a perfectly good Christmas decoration…"

Leonardo and Donatello stare at Raphael's cheek. There's a red mark that looks suspiciously like…

"Lipstick, Mikey?" Leonardo frowns at his youngest brother, wondering if they need to have a talk. He ignores his desire to find out where Michelangelo has acquired such a product in favor of asking, "Why were you wearing lipstick and going around kissing whoever was under the mistletoe?"

"How else was I supposed to separate the ones who have been kissed from the ones who haven't? That's how it's done in the movies!"

Leonardo drops his head into his hands while Donatello falls off the couch laughing. Raphael glares at them all and Michelangelo resolves to not believe everything he sees on TV.