Perfectly natural; just misapplied, IMHO. The example IS in nature. We simply choose to ignore it. But it's not a condemnation of anyone; just a desire for truth as opposed to a deception. Homosexuality is an excess brought about by excessive social pressures or, at least, that's the way it appears to me. To suggest that THEY are condemned to hell for it is absurd; that particular millstone, if I don't miss my bet, is reserved for others . . .
"All things are lawful for me, but all things are not expedient: all things are lawful for me, but all things edify not." (1Cor 10:23)
I smoke, okay? I like smoking. If it were banned, I might just have to start a campaign along with other nicotene crazed, strung out smokers to argue that it's a genetic impairment, and that we deserve some consideration as a matter of our ancient rights as an accident of evolution . . .
If gays wish to get married, they should marry -- if they need the approbation of law; they should lobby for it like any other interest group. If it's just a matter of health insurance and death benefits, hell, straights, both singles and marrieds, have the same problem. Smoking helps. :)