I'm not talking just in terms of height, but their overall size and musculature.

There's a lot of talk on PPD about hypergamy and women wanting to date up, for example in terms of income. But one thing I've noticed is that women find it almost impossible to be genuinely attracted to smaller men. In most couples I see, the man is bigger than the woman and when this isn't the case, you can tell by the body language that she usually resents him. I see it with men who are either average or skinny, with a larger woman. I don't think it's any surprise that larger women are the ones who find big muscular men the most attractive - because these are the only men she feels small with and can be properly attracted to.

Equally when the man is much bigger (for example, a big burly 6'2 bodybuilder type guy with a small 5'3 girl), you can tell by the body language that she's really attracted and horny for him.

I've also read before that in species where the males are much bigger than the females (such as gorillas), the alpha males form polygamous relationships with multiple females. Whereas in species where the females are bigger (such as many insect species), the opposite happens.

However these are just my observations. What do you think? How difficult is it for women to be attracted to physically smaller men?