In a world that denies most gender differences other than plumbing, a great many men don’t feel masculine, and a great many women don’t feel feminine.
What about you? How about your wife? Might be a good conversation to have!
I can tell you that femininity is not what most people think. I knew this man who was transitioning (badly) to a woman, and he thought that all he had to do to be feminine was wear lots of gaudy makeup (think drag), shave every hair off his body, and dress like a person going out to a gala, EVERY DAY. I told him that that is not the definition of femininity. I don't shave, I normally dress in pants and a somewhat nice (but can get dirty) blouse, and only wear makeup once a week or so. It's how you act and feel, not how you look. Sometimes dressing a certain way can make you feel more feminine, but I think this is conditioned, as cultures around the world certainly have different way of conveying femininity.