Generally, I find that looking at boobs has an overall calming effect on me given the aesthetics with which they present themselves. Although sexually arousing they relax me. Must be some primal breast-feeding memory or something. Naked breasts means that all is well with the world.
However, I have noticed a dichotomy in women's behavior when displaying what they've got. I can't tell what bugs women more, having their boobs ogled by a man they don't want staring at them or not being ogled by a man that they want to admire them.