After women have toned themselves with countless trips to the Stairmaster at the gym, Pilates classes, yoga classes, and broiling hot yoga classes, there is really only one final frontier of fitness to be addressed: their vaginas. That's why a physician in Manhattan has opened a gyno-spa called "Phitness," that is essentially a room down the hall from her medical practice. Per the New York Times, "At the spa, the signature treatment will be a......