I agree, animal behavior is not a yardstick to measure human behavior by, but to say that no other animals display homosexual behavior is just wrong.
To describe dominance displays or bonding activity in animals as "homosexual" is also just wrong.
So called scientists have agendas and see what they want to see and filter observations of animial behavior in order to relate it to and justify human behavior when in fact species specific behavior has no bearing on standards for human behavior
Many species are cannibalistic and/or abandon their young at birth. Does that mean it would be natural and normal for humans to do so also?
"Exclusively Homosexual" Animals Do Not Exist.