This is my first "real post" in quite a while... the first time my head has been clear enough to write something... :)
The "typical male fantasy" when it comes to Femdom often overwhelms newer Dommes, especially in cases where a vanilla wife/girlfriend discovers her lover is a closet submissive that wants her to be Dominant.
One of the biggest negatives that women often face is the thought that she will have to do too much and have to work too hard in order to live up to what she feels he expects of her (and what may have been portrayed to her in fetish fiction, websites, etc.). One example of this is the thought that her independent equal will be reduced to a helpless, childlike state. While there are Dommes out there that love to micro-manage or act as a cold-hearted slave-driver unleashing her inner prison guard, in my experiences these cases are quite rare. In most cases, the thought of having to instruct her sub on how to dress, what to eat, when to go to the bathroom, watch over him to make sure his tasks are completed, etc. are probably laborious and tedious.
One of the keys in maintaining a healthy, long-term relationship is to recognize how to balance autonomous action with control.
In many ways a sub may be very much like a child. A few examples might be:
-Rules to follow.
-Rewards and punishments.
-A curfew or checking-in.
-Must answer to an authority figure.
However, unlike children, subs shouldn't need a baby sitter. A submissive is an adult that should be fully capable of functioning independently if needed, the only difference being the parameters of freedom. Basically, they must behave responsibly like an adult but without the freedom of an adult. This breaks down the common male fantasy in many ways but makes things more realistic to integrate into a lifestyle. It is also what separates children from adults.
If a Domme orders the sub to clean the bathroom, she shouldn't need to oversee him or constantly check-up on him to make sure he is doing a good job and not screwing around (unless cracking the whip while he scrubs gets her off).
I think this is one of the keys to maintaining most D/s relationships, especially ones that are in their infancy. It's up to the sub to relinquish freedom while still maintaining a true level of responsibility.