Well, since men seem to be also having intercourse with each other, I suppose we could say that God made man to do that as well, couldn't we?

And I suspect that they're not "pretending" to enjoy it, but rather really are.

How will gay marriage destroy the future of traditional marriage? I don't see that happening, since maybe 90% or more of the general population is heterosexual.

Yes, in the United States gay couples are permitted to adopt. And as in any parent-child relationship, the parents influence the child's personality and behavior in school. But there's no reason to assume that the effect of that influence in the case of gay couples and their children will be a negative one.

And what about the kids telling their friends at school? It's only because some members of society have an intolerant view of homosexuality that could cause a problem here.

I will agree with you about one thing, though:

People should absolutely not be permitted to marry donkeys.

After all, donkeys are already abused enough when they are "un-naturally" mated with horses to produce mules. Why abuse them even more by mating them with people?