Why aren't women genetically predisposed to looking at guys?

as much as guys do to girls? Girls, including myself, certainly make a big fuss over our significant other turning their head to gawk at a random female passing by, either three feet away or thirteen feet away. So what's the discrepancy between the higher incidence of guys gawking at females, causing a commotion from a jealous and perhaps angry girlfriend/ wife vs the lesser degree of looking of the females at guys? Where does the difference lie (in the genetic code) and why? I've always wondered about what makes each gender tick and why they act and react the way they do. Thank you in advance for your input. :-)