In Bonk, the best-selling author of Stiff turns her outrageous curiosity and insight on the most alluring scientific subject of all: sex. Can a person think herself to orgasm? Why doesn't Viagra help women--or, for that matter, pandas? Can a dead man get an erection? Is vaginal orgasm a myth? Mary Roach shows us how and why sexual arousal and orgasm--two of the most complex, delightful, and amazing scientific phenomena on earth--can be so hard to achieve and what science is doing to make the bedroom a more satisfying place.