[apillar]

You want them to have love, and if that's how they want to express it, you want them to be able to do it openly."

You could make the exact same argument for pedophiles, zoophiles, polygamists etc.

[driftless2]

"same argument...pedophiles"

I've expressed those same sentiments. According to their logic, if a man wants to marry his daughter, and she's all for it, why should we stop it? If he wants to have 3, 10, 100 wives, why should we stop it if they all agree? If a man wants to marry his dog, the dog won't disagree. And since it would make the man happy (and happiness is the sole determinant), why should we stop it? Sheer lunacy.