Steve Sailer asks "Why do felines strike us as more feminine than canines?"
A few things that come to mind follow. These are just impressions from a human point of view and are not at all intended to answer Steve's other question about "sex hormones and receptors"!
- "Feminine feline" or "feline femininity" are elegant-sounding alliterations. Nothing to compare on the canine side.
- (Most) dogs are physically bigger than (most) cats.
- Dogs are more emotionally direct than cats are. They make no effort to conceal how they feel. Cats, in contrast, may feel one thing but show another.
- Dogs take to physical labor with pleasure. Cats do not.
- Dogs will ejaculate onto or into almost anything. Cats have much more discriminating sexual tastes.
- Dogs will urinate and defecate anywhere. It is only human social convention that puts some (perpetually tenuous) restrictions on this. Cats are quite particular about the what and where of their waste excretions.
- Dogs are opportunistic omnivores, and they'll eat anytime, anywhere. Cats are pickier on both accounts.
- Dogs love wrestling and roughhousing. Once they've grown out of the kitten stage, cats don't.
- Dogs expect and abide a strict social hierarchy. Cats are more egalitarian.
- Dogs are loyal. Cats will abandon a companion at the drop of a hat if a novel one strikes their fancies.
- Dogs guard their territory and they will often fight to maintain it. Cats have no problem letting someone new move in on them, especially if the conqueror provides them with more goodies than the previous patriarch did.
- Dogs verbally and physically announce their presence. Cats are usually discrete.
- Dogs don't spend as much time or effort on preening themselves as cats do.
- Dogs love just about anything involving a ball. Cats don't.