A thorough examination into the life and style of animals can show that each and every instance of sexual union ends in an utterly disagreeable finale. The male always is the recipient of unmentionable disgust and anger that the female conveys at the end of every such act. Also, the expression of such displeasure can be readily observed in the post mating behavior of all females, many of them acute, violent and life threatening, even resulting in the death of the male.
What rationale can justify subjecting the complete animal kingdom to such a predicament if not for meeting an essential need of life?