Natural law theory is based on casual observations of nature with a projection of cultural values imbued into these observations.
Heterosexuality is the norm and any variation of sexual expression is perverse and unnatural .
This is often the world-view that is presented in children s stories, where animal families mirror contemporary human families. Thus our heads are filled with the imagery of natural law theory very early in life. The basic problem with this theory is that it is a false doctrine. We know this because 200 years of scientific observation of Nature have proven the error of this theory. We know that the natural world is NOT neatly divided into male and female.