Because of this quote here:

In the end, Jim [McCartney] restricted himself to making them food. He'd had to take up cooking, after a fashion, when his wife died. He found to his delight that although his own two, Paul and Mike, were very choosy about their food and were poor eaters - and when Paul was busy, he wouldn't eat at all - John and George turned out to be gluttons who would eat anything at any time. 'I used to work off all the stuff on them that Paul and Michael had left. In the end, I didn't have to disguise it but just say there was some leftovers here, would they like it. To this day I always have to make George some custard when he comes. He says my custard's the best in the world.'

(And the fact that I really need help.) Here's yet another Beatles WG chapter. (Quick warning, slight slashyness near the end.)

John and Ringo VS George and Paul

Rules: The two guitarists (being the gluttons that they are... Well, according to the above quote that is) would be stuffing themselves while Paul and Ringo would be constantly placing food in front of them.

John: *stuffs large amounts of food into his mouth before eating* "You really think you can beat me Scrawny?"

George: *swallows any food whole* "John, have you not seen me at a buffet before? I'm obviously gonna win!"

Paul: "Just don't get anything on me clothes."

Ringo: "I hope this won't go on for long. It's so tiring to go back and forth and being careful to not drop any plates."

Two hours later

John: *Struggles to reach a pie* "Damn it. My arms are practically useless now!"

George: "HA! So do you forfeit the contest?" *even though he also can't reach anything*

John: "Not in your life. RINGO!!"

Ringo: *proceeds to feed John* "Can you just give up already George? Mostly because I'm really tired and this chapter is starting to drag on."

Paul: "Are you nuts or something?! I know George has still got lots of room left in there. *starts feeding George*

Another two hours later.

Ringo: "Hey author! We're out of food, and kinda running out of space in the room, so can we just call it a tie?"

.... Alright.

John: "*burp* I still think I could have won if the contest hadn't ended so quickly. *rolls onto his back* Ugh... I feel so bloated."

George: "*groaning* I think I've got cramps."

Paul: "Sounds like someone has a bad tummy ache." *approaches George*

George: "Oh shut u... Paul? What are you doing?"

Paul: *massages George's belly* "Just relax, I'll take care of you."

George: (The author just had to add in more cheesy slash.)

John: "I'm not a mattress Ringo! Get off me!"

Ringo: *snuggling deeper into John's belly* "Just a few more minutes John. I'm still tired from all that feeding."

John: (Alright that's it. I'm killing the author tonight.)

Woah, easy there John. Before you do that I'm just going to ask any readers a quick question.

Would anyone be interested in me writing a fanfic with one-shots dedicated to the Beatles gaining weight?

John: "Don't be surprised when everyone says NO!!!"