How can the Church say homosexuality is unnatural when many animals exhibit homosexual instincts?

Full Question

Catholics say homosexuality is against natural law because God created the sexual faculty for procreation between male and female. Perhaps most interesting is the fact that many animals have the choice of both sexes but prefer the same sex. In fact animals with high status are among the most rampant. With this plethora of evidence how can some Catholics still insist that homosexuality is evil and against natural law?


Natural law pertains to creatures who can reason. The Old Catholic Encyclopedia quotes St. Thomas Aquinas when defining natural law: “According to St. Thomas, the natural law is ‘nothing else than the rational creature’s participation in the eternal law’ (I-II, Q. xciv).” Remember, many animals also eat their young. Better not to go there!

Fr. Vincent Serpa O.P.



  1. Tom Rafferty Reply

    Christians have two choices regarding sex and gender; accept unsupported dogma or the findings of science. Since science has a method to verify its findings, and it has found that sex and gender are not binary but on comtinuums, it is unreasonable to accept the former.

  2. Patrick Gannon Reply

    “Natural law pertains to creatures who can reason.”
    Hmm. Do animals reason?
    “If we apply this term to the process by which an animal, profiting by experience, adapts his actions to somewhat varying circumstances, there can be no hesitation whatever in giving an affirmative answer to the question. There is no doubt that animals not only profit by past experience, but that they can apply this experience to concrete situations as they severally arise.” Mead Project, Morgan.
    There are many documented cases of animals – even birds, reasoning through a number of complicated steps in order to come to a conclusion that provides them with a treat. A number of animals – some of whom exercise the behavior discussed here – are able to recognize themselves in a mirror and thus possess conscious self-awareness. The ability to reason seems to be a continuum, not something that only humans have. We just have a higher degree of reasoning power (well some of us).
    As an aside, while the author speaks of animals eating their young, the bible speaks of…
    “…O daughter of Babylon, you devastated one, How blessed will be the one who repays you With the recompense with which you have repaid us. How blessed will be the one who seizes and dashes your little ones Against the rock.”
    “The people of Samaria must bear their guilt, because they have rebelled against their God. They will fall by the sword; their little ones will be dashed to the ground, their pregnant women ripped open.”
    “He struck down the firstborn of Egypt, the firstborn of men and animals.”
    What kind of “reasoning” gave us those words of wisdom, love and compassion?

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