Christian theologists are obviously not watching nature. I think they should take a vacation to rest and observe nature, how beings are constantly driven by pleasure seeking instincts, how human behavior is so diversified and how nature is a collection of complicated varieties of species. This IS nature.
....having sex without being engaged in the work of reproduction causes nervous disorders, madness and physical deformities. It naturally follows that homosexual practices are impermissible as well. This is absurd to me.
I am a bit confused about how Bhikkhu Buddhadasa on the one hand encourages reproductive sex ("the human race must be preserved through the duty of reproduction for as long a time as is necessary for humanity to realize the highest Dhamma - nibbana"), but in the next paragraph claims that marriage should be without sex.