And the orientation of the design did in fact have a noticeable effect! The right-side-up T could increase a man's attractiveness by as much as 12 percent, the researchers found. The effect was much more pronounced in men who were less fit to begin with, the theory being that those folks simply had less to gain from an optical illusion. But good news for those of us with bodies that look more like old sacks of overripe avocados than a conventionally attractive human male torso!