Mike was baffled by the whole idea - Jill's reversal from an attitude that he had never understood but had learned to accept into exactly the opposite attitude of pleasure - sexual pleasure, he understood - at being stared at... plus a third and long-standing bafflement at Duke's "art" collection - it certainly was not art.  But the pale, wan Martian thing which parallels tumultuous human sexuality gave him no foundation for grokking either narcissism or voyeurism, modesty or display.