Birds know how to build a nest just in time for the eggs to be laid followed by nesting. The male and the female take turns sitting on the nest until the eggs hatch. These instincts are imprinted on their brains in order to reproduce the species.
The trait of reproduction is paramount in importance and is found imprinted in every animal and plant in order for each species to have the best chance to survive and mutate in its environment.
Human beings are animals as well, but because of their higher intelligence, they also have the ability for rational thought, which sets them apart from the rest of the animal kingdom.
Intelligence gives humans the capacity, to some extent, to override instinctive traits, which they inherit by virtue of the fact that they are humans.
The basic imprinting of the human brain contains survival and reproductive instincts that cannot be totally repressed through intelligence and rational thought. The basic survival instinct is so strong that it interferes with rational thought and logical discussion. Homosexuality denies the instinctive need for reproduction and therefore is rejected and becomes repugnant to others of the species. Abortion also violates the reproduction imprint.
I submit that the reason the subjects of abortion and homosexuality are so difficult to discuss is that the basic instinct imprinted in the human brain from prehistoric times interferes with rational thought, and the result is an emotional response. It is difficult for rational intelligence to override totally the imprinted primal instinct of survival through reproduction.
Ronald M. Davis
Pinehurst