The difference in the atmosphere where a single woman or a single man lives is very significant. It’s hard to imagine any man having a room with a pink wallpaper with flowers or something like that. Of course it’s also very hard to imagine a woman having a room where black is the main color.
Interiors with a male character are usually distinguished by the abundance of sharp corners and by using a lot of steel, glass, leather and wood. Most of these materials are often rough because men usually have a tendency to like everything that remind them about caves.