Sex crazed - Ray Gordon

Robin Sane is a psychiatrist in the loosest sense of the word.
Ninety percent of his patients are young women, all of which have been given the same diagnosis. Their phobias and anxiety are due to a deep-seated sexual problem.
Charging a fortune for a consultation, and even more for a thorough examination, his life is nothing less than heaven.
Until he advertises for a housekeeper and Crystal enters his life.

It's only a short time before Crystal realises that Robin is totally Sex Crazed and she wants to leave.
However, money is tight and so she moves a friend into the house to live with her.
Lorraine is a stunner, and also happens to be as Sex Crazed as Robin.
Everything seems to be going just fine, until Crystal asks another friend to stay, and then another.
With mounting electricity, phone and gas bills Robin feels his business going under, until the girls offer to help.

These girls are resourceful if nothing else, and they've each got their own intimate way of raising cash.