It doesn’t quite fit into the “moon is made of green cheese” idea, because of the reference to personal experience.
The moon being made of green cheese probably deserves a geezer alert >50 years past the US moon landings, but a day later here it is again, in a non-CIDU.
Where did the green cheese idea even come from? The old theory that birds migrated to the moon made some sense centuries ago, but green cheese?
Comics I Don't Understand 
It helps to remember that “green” in this case means “unripe”. Back when people made their own cheese or knew someone who did, it was easy enough to come up with the simile of the moon looking like a wheel of cheese that hadn’t matured.
No geezer alert required: the expression about the “cheesey” moon has been around for centuries, but was never meant to be taken literally, as the twerp pushing the box seems to have done. It’s hard to tell whether the two astronauts are annoyed, or simply dumbfounded.
P.S. The saying features prominently (and in a literal sense) in the first Wallace and Gromit cartoon “A Grand Day Out“, in which Wallace builds a rocket to go to the moon, just because he loves cheese so much.
Hooray for Wallace & Gromit!! Cheeeeeeeese.
@ Andréa – I was expecting an earlier scene (I hope this works):
I was looking for that, but got sidetracked by the actual cheese-eating clip. We use the ‘cheeeeese’ comment often at our house. Unfortunately, the actor voicing Wallace (Peter Sallis) recently passed away, so probably no more W & G movies.
So what to my wond’rin’ eyes should appear on YT . . . there’s a new Wallace & Gromit in the works for 2024 . . . on Netflix, so I won’t see it, but I’m curious about Peter Sallis’ replacement.
Oh, does Wallace enjoy cheese?
@ Andréa – All good things come to those who wait(ress).
P.S. @ Brian – Just in case the question was not rhetorical: Wallace’s undying love for cheese has been featured in several Aardmann works, but particularly in his first appearance (see above), and in the “Were-Rabbit” movie, both of which used it as a major feature of the plot.
As I don’t have and would never get NetFlix, I’ll have to wait a loooong time. Something to live for, I guess.
As an aside, Peter Sallis played Norman Clegg in Last of the Summer Wine; whenever he speaks, I immediately visualize Wallace, rather than Cleggie.
Interesting alternatives to Dry January. We have people swearing off Netflix; Word Press sign-ons; and Google Chrome without super-strength ad blockers.
Just in case the question was not rhetorical
More towards “disingenuous” I’d say.
@ Andréa – The “replacement” actor is Ben Whitehead, but he’s been doing the role for quite some time, since Peter Sallis retired in 2010.
Thanks for the info.
@ Andréa – In addition to the new W&G film, Aardmann has also announced that a sequel to Chicken Run is already in production.