Basically the girls are saying they like happy-looking, care-free sounding guys.
Boy’s interpret that to mean, “Try and look as much like a girl as possible.”
It must be rough for them, in this land of men too afraid to show any emotion at all. Fear is the norm here, and who can blame them, with mommy constantly telling the babys “Abunai! Kiotskutte! Dame! Kitanai!” Real danger or not, she is consistently harping on the negative aspects.
The kids think the entire world is a rabid dog about to bite.

So they pluck their eyebrows, wear long-pointy shoes and never smile.