This undated ad for the Erotica, a pornographic land-line telephone, was supposed to make its owner feel like Hef every time he (or she) clamped a badly rendered, unwieldy sculpture of a naked woman to his (or her) head. I think it probably underperformed relative to the promises made in the ad, and yet it represents a fascinating glimpse into a theory of action as embodied by an optimistic manufacturer in days of yore.