Courtship and Marriage Between Hemisity Subtypes
There are four possible hemisity couples: RM-RF, LM-LF, RM-LF, RF-LM
Which are the most common? Study of 406 spouses of greater than 5 years duration:
Two thirds of these 203 couples were of Complimentary Hemisity: RM-LF or RF-LM couples
One third were of the Same Hemisity: RM-RF or LM-LF couples
Based upon these and other results "Opposites Attract" appears biologically to be the case:
Within couples, the RMs or RFs are dominant in the home while LMs and LFs are supportive.
Thus RM-RF marriages are less stable than those of RM-LF or RF-LM couples,