Scientists have discovered a food that diminishes a woman's sex drive. Wedding cake.
I've long held to a different theory, and it is this;
All of a woman's sex drive is contained in the very tip of her left ring finger. Putting a gold band around this finger cuts off circulation just enough to kill or severely wound her sex drive. When the ring comes off, the sex drive comes back. See? a working hypothesis that fits all the facts :) (boy, am I gonna get it about this :)