You got twenny bucks?

Your typical 5.30am conversation...

K: Lenny.... you awake?
S: Mmmphf
K: Well, see, I was just wondering....
S: *heavy sleepy breathing*
K: ....why are those sandwiches called elevenses?
S: Well, you know a bakers' dozen?
K: Yahh
S: It's because they take a bakers' dozen and take off the two crusts at either end so then you're just left with eleven. Elevenses.
K: Naaooooo, that's not right. A bakers' dozen doesn't refer to the number of slices in a loaf. It's the number of bakery items in a lot.
S: *silence*
K: *stumped by silence* Isn't it? That's not right. 'Cause there's not 13 slices in a loaf of bread. Or is there?
S: *breaking in on above out-loud train of thought by K* Ok, the real reason is, you remember Mary? Listen... remember Mary?
K: Mary?
S: Yeah, Mary, she was one of King Henry the IIIV's wives. See, she invented elevenses.
K: What? How do you know this? Did you go google?
S: *ignoring* Henry IIIV wanted a sandwich and she made one one day and because she was his eleventh wife and he was a bit of a pansy and he cut off her head, he called her sandwiches Elevenses. 'Cause she was his eleventh wife.
K: Naaoooooo! .............*unsure because S sounded so convincing* Really? Nah! Why wouldnt' they be eleventhses then? *thinking reeeeally hard, too hard, about it*
S: Lenny...
K: *musing* I always thought, as a kid, that they were called Elevenses 'cause after they cut the crusts off each edge of the sandwich, they cut them into three fingers and after you've eaten one, you're left with two. And that looks like the number eleven.....
S: Lenny...
K: Was it really invented by King Henry the IIIV's wife Mary? You're tricking, aren't you?
S: You got twenny bucks?
K: Wha'?!?
S: I've got this bridge I want to sell you....