Venus holes (or Apollo holes on the back of men), are small circles that appear on the lower back of both sexes. They are located on a point where two bones connect the pelvis and appear only in people with genetic predisposition or appropriately sized ligaments.
They indicate good circulation which is vital for proper orgasm. Since the Venus (or Apollo) holes lie at a point with no muscles, it’s impossible to create them with exercise, but if you’re trying to lose weight, they can appear on your lower back.
Source : http://healthybiofood.com