>>It seems the difference is nature.>>
Yes, and behavior. And behavior requires a choice. Hence, the preference of the gay lifestyle.
>>This leaves more questions than answers>>
He already answered your question 1.
Your question 2 was answered in his retort to the homosexual's question on the Doles.
Your question 3 is irrelevant but interesting.
Your question 4 assumes that people living today are better capable of child-rearing than any generation before us, and that homosexuals are just as capable of nurturing children to be productive members of society as non-homosexual marriages. The first assumption is invalid on the basis of pride. The second is false, since adults teach their children far more by example than by word. Homosexuals cannot provide an atmosphere in which a child can learn how to procreate and raise a family in that framework.