What he saw when he looked at Pat without her tattoos pleased him but not as much; she looked as a woman necessarily must look to be woman.  Mike still did not grok Duke's collection of pictures; the pictures were interesting and had taught Mike that there was more variety in the sizes, shapes, proportions and colors of women than he had known up to then and that there was some variety in the acrobatics involving physical love - but having learned these simple facts he seemed to grok that there was nothing more to be learned from Duke's prized pictures.  Mike's early training had made of him a very exact observer, by eye (and other senses), but that same training had left him unresponsive to the subtle pleasures of voyeurism, it was not that be did not find women (including, most emphatically Patricia Paiwonski) sexually stimulating, but it lay not in seeing them.  Of his senses, smell and touch counted much higher - in which he was quasi-human, quasi-Martian; the parallel Martian reflex (as unsubtle as a sneeze) was triggered by those two, but could activate only in season - what must be termed "sex" in a Martian is as romantic as intravenous feeding.