Lately I've been kind of a jerk-off especially about this whole sex thing. Well karma is a bitch, and don't worry, I got mine. Apparently for us lucky ladies it is actually normal and healthy, or can be for us to have a menstrual cycle as short as 21 days. Did you know that's like... three weeks? Three weeks. Holy fuck that is like way too soon. I never paid attention to how close together my periods were until I started having sex with my ex gf. It kind of made it important. Especially since she was on birth control for an auto-immune disease and that was the only way to really regulate it.