Somehow the Marauders had caught wind of the (infamous) game, Strip Chess.
Somehow the Marauders had managed to play Strip Chess for two hours and fifteen minutes with all of the participants having no idea how to play chess, let alone a variation that resulted in nakedness.
"No, you can't jump my little guy over that one!" Peter cried, picking up his own piece and putting back where it originally sat. He was glaring at Sirius with extreme distaste.
"It's called a pawn. Jesus Christ." Muttered Lily, who had sat within eyesight and hearing distance of the four.
"Porn?" Sirius raised his brow and stood up (for dramatic effect, no doubt), suddenly a lot more interested in the marvellous game, which is a lot considering the said game of Strip Chess contained a Remus Lupin in boxer shorts. "As in ography?"
"NO! God no! The piece, it's called a pawn. P-A-W-N."
"Oh." Sirius said, clearly disheartened, he sat back down. "Still, Peter, you coughed before it was my move, meaning that I had to take you place. I moved your porn to jump over Remus's piece, meaning that Remus loses one of his guys and because you coughed you also have to remove an item of clothing. Cough up. Be a man!"
"I can't take anything else off, Sirius." Muttered Remus into Sirius's ear. "We should've played this in the dorms like I said."
"Peter, take your other sock off, that'll do." Suggested James. Peter began to jump back into his jeans.
"But it's just nakedness!" Sirius sounded shocked, apparently the thought of people being a tad embarrassed about their bodies had never occurred to him. "I've seen you naked plenty of times!"
"It's not you that I'm worried about…"
"Well, own up to what you've done. I want payment." Sirius crossed his arms stubbornly.
Remus stood up, sighing and grinning at the same time, he sauntered halfway towards the stairs.
"What!? You can't run off! I want payment, Mr Moony!" Sirius called from the sofa.
Remus rolled his eyes. "Are you really that thick? You're coming with me, I need to pay my debts."
Sirius shot up like a dog to a bone and walked out of the door, trying to contain his dignity.
Lily coughed, trying to break the tension.
"How are you even playing chess with four players?" She asked, peering over to see the chess board. "It's traditionally a two player game."
"You're shitting me!" Said James.
"I kid you not." Lily replied.
"How the hell are you meant to play it?" James grumbled, hating it when Lily became condescending.
"I'll show you." Lily promised. "It's not too tricky, didn't you play Wizard Chess? I saw you last Christmas playing it with Peter. Well, it's a lot like that actually."
"I still don't get this Muggle stuff."
"Oh, honestly, James. Stop being so stubborn."
And that is how James and Lily finally climbed over their burning desire of hate for each other (well, Lily at least) and began to talk like normal, civil, functional human beings.
And we all know what that led to.