Bonk by Mary Roach
The cover of this book shows two ladybugs having sex. Roach is also the author of Stiff, an interesting book about cadavers. Right now I'm half way thru the book and she's in TAIWAN!! There's an expert urologist who's working on ED. A patient is on the operating table and he's covered with a giant sheet, except for his ahem. Roach describes it as the opposite effect of a fig leaf which only hides the ahem. Never before has a general interest book had the word "cervix" in it this many times.