I totally agree with this. I'm a girl and a 5, but I've always felt more "masculine" than feminine really. There's nothing masculine in my appearence (maybe just the fact that I almost never wear skirts or dresses, but that's all), nor do I look like a tomboy, play football or like cars, etc... But there's something that I feel alienates me from other women; I don't relate much with their emotional problems or their usual interests (fashion, shopping, romantical books or movies...). My best friends are women indeed, but there's like a gap between us.So you see 5s as lacking gendered traits in general, and 4s having a mixture of stereotypically masculine and feminine traits, right? I can agree with this to an extent, but overall I see 5s as being primarily a masculine type (probably the second most masculine after 8s actually), and 4s as more feminine. The typically cold, calm, logical, unexpressive nature of 5s is closer to the average western idea of masculinity than the deeply emotional, sensitive nature of 4s.
Also, in front of a baby I'm completely expressionless (although I can get quite tender with baby-animals) and I don't have maternal instincts at all.
I've had these traits since my earliest years as a kid; I never wanted to play with dolls, only with toy dinosaurs, spiders, monsters and the like. So it's not really something learned from the environment, but an inborn characteristic.
Many times I feel sad and uncomfortable being a woman. Guess I'd been happier being a (gay) man....
However, I'd like to think that all these gender roles are just products of our society, that there's nothing in nature that truly says that power and strenght is "masculine" and tenderness or emotions are "feminine". Nowadays the roles seem too inflexible. The artists from Romanticism, for example, exalted feelings above everything else, and nobody thought of them as girly because of that (as crazy, maybe).