John Fowles 
Mantissa [EPUB ebook] 

Miles Green wakes up in a mysterious hospital with no idea of how he got there or who he is. He definitely doesn’t remember his wife, or his children’s names. An impossibly shapely specialist doctor tells him his memory nerve-centre is connected to sexual activity, and calls in the even shapelier Nurse Cory to assist with treatment… In the most unorthodox of hospital rooms we eavesdrop on the serious discourse, virulent abuse and hilarious mockery of the erotic guerilla war that is Mantissa.