Short novel, skimmed it in 20 minutes. Only something Philip Roth could come up with. A professor literally turns into a 150+ lb female breast. Most of the time he's dealing with doctors, his father and various collegues trying to figure out what happened and adjusting to his new existence. He's figured out he can get incredible orgasms from having his nipple stimulated, so the rest of the time he's trying to get his girlfriend or one of the nurses to sexually take care of him (his girlfriend can only visit for an hour at a time, so he allocates 30 minutes for her to perform sex on him and the rest of the time to conversation so she'll continue to come back to see him).