When God created animals as male and female to populate the earth with one mate only because the genealogy would be all to close and freaks of nature would be the result.I do not think that God ever intended for a male and a female to be life partners. Life partners and married couples is a creation of man and woman in order to pledge that they will be true sexually for as long as they live. This structure of marriage (which I believe in very much )began when men and women began to use surnames (last names )then marriage created a proper format for humans to create family trees and to know who was the proper parent of a child,And to carry on a family name in the proper order. Men and women use the union of marriage to pledge their desire to spend their life together and / or have children together as a family.I personally know a person who owns an adult sex toy store that is very successful. in this country there are very few sex toys that work well for men. 90% of his customers are men and they purchase sex-toys for there wife or girlfriend because most men do not understand that it takes a lot longer for a female to be happy than it does for most 10 minute men. therefore the toy store makes the most money form women even if the man makes the purchase.