I guess where and when does it become "unnatural"? In a short time, sex with dogs, horses, and other animals may become "it's just is" as some have mentioned about homosexuals in this forum. Are those natural? Should a person be able to marry his/her dog? The homosexual message is repeated so much over and over again until people lose perspective and most just say something to be agreeable and not to "offend" instead of what they really believe in. So if you think it is natural or it's just is, would you eat a cookie that a homosexual person baked? Be honest with yourself.
Why, oh why, do people try to link bestiality with homosexuality? Try to come up with some stupid "slippery slide" argument like one will lead to the other? Never mind the fact that animals cannot give consent, cannot enter into contracts (marriage), just throw out the window that we are discussing two PEOPLE, consentingly, knowingly, entering into relationships regardless of their sex/gender. The sheer stupidity of these arguments is enough to bring headaches. And regardless what you may think, most people do happen to believe that there is nothing wrong with homosexual relationships.
As a footnote, I don't know if you are being literal in the last line or trying to say something else,...but you do realize that homosexuals work in all areas right? You have no idea how many times you have eaten something baked or cooked by a homosexual person...I'm betting a lot. Not to mention that homosexuals have probably been making your clothes, building your cars, programming your computers, and singing songs you hear on the radio. Yep, here you are, in clothes that homosexuals made, driving your car built by homosexuals, listening to music assailing your ears sung by homosexuals. Are you infected with homosexuality now? Do you feel..."dirty" yet?