The Abnormal Ones by Herbert O. Pruett

Theirs was the ecstasy and agony of unconventional sex... They passed for 'nice' people, all of them. Yet in their perverted community flourish secret relationships of the oddest kind. For example... The male satyr is the intimate friend of the pretty lesbian... The lesbian is the close companion of the satyr's bisexual wife... A pair of bachelor girls just love the satyr, especially in bed... and they just love the bisexual wife, too... A married couple, supposedly normal, manages to get in on the act...This adult and penetrating novel presents situation after situation unmasking the behavior of the abnormal ones around us. It seeks for causes. It suggests radical cures!