I will admit, I'm anything except spontaneous:) I like things planned beforehand and have special days for cleaning the house and others for hanging out with friends. When I'm out shopping, I have a list Of Necessary Items in my hand and I seldom buy anything which isn't on it, even when it's on sale and I may use it in the future. In the past I have been known to write elaborate schedules and dinner menus.
There is one problem with this way of life, unfortunately. It's all very well when you are alone, but it becomes darn difficult when you have a family, as there are always some emergencies coming which interfere with your schedule tremendously. You simply can't take it for granted that you'll be able to vaccuum your whole house in peace on any given day any more. And then your husband comes earlier from work and suggests you two go out and drink a cup of coffee somewhere. What's a girl to do?
In my opinion, the lack of spontaneity is often connected to the control issue. Making schedules and elaborate shopping lists and planning every appointment two months before is the way to control one's surroundings. It's OK, to a degree, since a housewife is a family manager, but when it's taken to the extreme it will cause frustration both to the lady herself and to the unfortunate members of her household.
Being a control freak is never nice, especially in the relationship with your significant other. There should still be some fun, spontaneous interaction between the husband and wife, even (or should I probably say "especially") as they get older. If he asks you out, just go and let the laundry wait. Tomorrow is another day:)