This is in the top 2% most wholesome manga on the planet and I wish I wasn't caught up because I want to read 5 chapters every day forever.
Anyway I can see why the joke was necessary because rain, teru teru bozus, of course, the author almost had to do it. It is a pretty big plot hole that her head didn't fall off though. :P
Just because Junior boy is the only male under 40 in the the village (or at least in this manga) who isn't still in elementary school is no excuse for Akane having such poor taste.