Humans could couple up differently, if they wanted to.
His big toe has the same diameter as her wrist. His unflexed bicep is wider than her waist.
Maybe gender differences in color preference are just an anchor for children's gender identity performance.
Fortunately, the hotel we're stranded at is only a few blocks from the Art Institute of Chicago. Tooling around the museum I was still thinking about sex dimorphism, especially this piece in Time where I referenced ancient art and this one where I compared depictions of Hercules. I have no expertise in art history, so…
Disney's Hercules has man:woman measurements greater than any normal human pair -- and greater than ancient depictions, too.
Stoick the Vast has much bigger hands than Valka.
A few examples of animated male-female couples without exaggerated body-size differences.
The evidence is mounting that Disney likes small-handed-women-large-handed-men couples.
Can I reach that for you, honey?
He's only a little taller and a little older. But look at those hands!