This is a common error made by those in the pro-homosexual movement. It is an error known as a category mistake. A category mistake is attributing the property of one thing to something else that does not have that property. For example, to say "Blue sleeps faster than Wednesday" is to confuse an attribute of color with speed and compare it to a name. This error is very common among proponents of homosexuality. Another example would be to say that "Gay sex is just love." This confuses a sexual behavior with an emotional condition. They're not the same thing. Besides, if they were, then there would have to be a whole lot of love going on, as this quote would demonstrate:
"Bell and Weinberg reported evidence of widespread sexual compulsion among homosexual men. 83% of the homosexual men surveyed estimated they had had sex with 50 or more partners in their lifetime, 43% estimated they had sex with 500 or more partners; 28% with 1,000 or more partners. Bell and Weinberg p 308." (exodusglobalalliance.org/ishomosexualityhealthyp60.php)
HomoSEXuality is a behavior, an action. It is not the same thing as a genetic condition such as skin color, height, or gender. Homosexual intercourse (is there homosexuality without it?) is a behavior and is, therefore, something people choose to do. Actions are what people choose to do - whether or not they have a tendency. On the other hand, being born in black or white skin is not a choice and is not a behavior.
Therefore, when homosexuals appeal to the argument that being born gay is like being born into a particular race, they don't know what they're talking about.