The Way of a Dame by Fletcher Bennett

'When you meet a female to whom sex is a way of life...watch out, friend...you can get more than you paid for--or wanted.'

'As roommates, Judy and Penny shared everything . rent, food - even bedmates. Steve was delighted when informed of the arrangement, but even though his body responded eagerly, his mind told him there was something strange about this 'double-your-pleasure-deal''