The quotation is simply suggesting that anytime a man meets a woman, he performs a quick assessment of her potential as a sexual partner. It does NOT mean that every man tries to bed every woman he meets.

meself, I suspect that we all have our own personal templates, archetypes we recognize at a glance. But to call that recognition an assessment, as if all members of the opposite sex were quickly but equally examined, seems like a lot of work. Humans (like other mammals and who knows what else) recognize patterns, and those can be quite complex, including gender, dress, behavior, receptiveness, whatever. I suspect it is less a matter of all comers being treated to the same quick assessment as it is a matter of upon recognizing the type, a second glance is garnered, to see if this person fits the personal preference.

And since no one is going to exactly fit that type, there is a sliding scale at work. How close does this individual come to that desirable pattern, is it worth the attention and effort, assuming you're in a position to exert that effort? This whole process probably takes place in microseconds.

SRS