Was talking to a lesbian earlier who said a guy got mad at her for not wanting to feed him. Incredible logic on that guy. =/
If they've been abusive, click the red flag on their profile and make a short note for the mods to check later. Don't forget to keep any evidence if possible.
She wasn't being serious about demanding respect, she was just snarking. Anyway, again, please move on people.
Also google "When Women Refuse Tumblr" and have a look through the first link that comes up.
Yeah it can be natural. How people's lives and moods go can affect it too. Some can even pick up new fetishes.