Fizik's concern with your nethers isn't just out of consideration for your future children's existence, but rather the simple truth that a person with a comfortable and fully awake taint will actually enjoy riding a bike. Since everyone's spine and butt are of different sizes and flexibilities, they've made three different Kurve saddles—bull, chameleon, and snake for stiff, average, and flexible riders.
Fizik's been using these "Spine Concept" categories for a while, but the Kurve is far more than simply the shape. In lieu of cutouts, the saddle uses a different construction with a one-piece carbon rail that attaches at the saddle's edges, which enables the entire structure to flex as a cushion. No padding needed. When you're on it, your weight compresses the saddle and the cleverly chosen reinforced areas underneath put everything where it's supposed to be.