I've wondered the same - even more generalized about hobbies, but think about what is important to woman like hair and makeup. Those things are contrasting getting in H20. Here is an answer I got when I went searching - "If I cook, redecorate, put on makeup, or polish my nails, these things are just proper behavior -- normal maintenance expected of all women. If a male friend cooks, redecorates his apartment, plays a game, or paints models, these are hobbies that help make him a more well-rounded individual or help him unwind from his busy day of meaningful work. "My hobbies don't "count" because they're just things women are expected to do, not enriching, edifying, or relaxing like proper male hobbies.