There Is No "Homosexual Instinct" In Animals
'"Anyone engaged in the most elementary animal observation is forced to conclude that animal "homosexuality," "filicide" and "cannibalism" are exceptions to normal animal behavior. Consequently, they cannot be called animal instincts. These observable exceptions to normal animal behavior result from factors beyond their instincts.
-- Clashing Stimuli and Confused Animal Instincts
To explain this abnormal behavior, the first observation must be the fact that animal instincts are not bound by the absolute determinism of the physical laws governing the mineral world. In varying degrees, all living beings can adapt to circumstances. They respond to internal or external stimuli.
Second, animal cognition is purely sensorial, limited to sound, odor, touch, taste and image. Thus, animals lack the precision and clarity of human intellectual perception. Therefore, animals frequently confuse one sensation with another or one object with another.
Third, an animal's instincts direct it towards its end and are in accordance with its nature. However, the spontaneous thrust of the instinctive impulse can suffer modifications as it runs its course. Other sensorial images, perceptions or memories can act as new stimuli affecting the animal's behavior. Moreover, the conflict between two or more instincts can sometimes modify the original impulse.
In man, when two instinctive reactions clash, the intellect determines the best course to follow, and the will then holds one instinct in check while encouraging the other. With animals that lack intellect and will, when two instinctive impulses clash, the one most favored by circumstances prevails.
At times, these internal or external stimuli affecting an animal's instinctive impulses result in cases of animal "filicide," "cannibalism" and "homosexuality."'
The Animal Homosexuality Myth
by Luiz Sérgio Solimeo