An Evolutionary approach to mate selection
Many socio-biologists expect males and females to behave differently due to biological (genetic) factors based upon evidence indicating that men think more often about sex, have more partners, report more use of porn)

(Buss, 1995) suggests that males prefer attractive physical features, women who are young and fertile.
 

Females prefer healthy but wealthy, mature, dominant males who can support and protect with a long term investment. Study done across 37 countries. Fig. 3.2  

Critique:
Not falsifiable but based upon speculations and guess work.
Verification of hypothesized "causes" is done to confirm theory.  

Makes use of stereotypes and masculine bias

Socialization is actual cause of similarities and apparent universal preferences

Standards within a society change and across them too, with contact

Sample may not be getting people "off the beaten track"
 
  Elsewhere Buss discusses on you tube how men and women have conflict with each other, due to genetics