Tushology: where B equals Bounce Factor

Over drinks, it has been discussed many a time: the science of tushology. As a friend of mine put it, a tush is the ultimate perfection (what most super models have), an ass includes the majority of fairly attractive women, and a butt is the bottom of the totem pole. An article in the New York Times even outlined the mathematical equation explaining tushology:

"The equation that describes the quality of the female rear end, according to Holmes, is (S + C) x (B + F)/T - V, where S = Overall Shape (“including tendency to droop”), C = Circularity, B = Bounce Factor (not to be confused with “wobble”), F = Firmness (with perfect being “like a comfy bed”), T = Skin Texture and V = Vertical Ratio (the goal: “on the top-heavy side of symmetrical”). For the male rear end, the equation replaces bounce, circularity and vertical ratio with M (Muscularity), L (Leanness) and O (Overall Symmetry)."

Is it no wonder then that Jessica Biel has chosen to display her derriere, following in the footsteps of Jessica Alba's highly sought after bikini bottom. Jessica Biel likes to give as well as receive, though, passing her booty baton onto Maria Menouno's tush with a brief slap and verbal encouragement.