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It doesn't undermine the fact that there is a choice, however. Homosexuals can still choose to be celibate.
Indeed. If they come to the conclusion that homosexuality is genetic, who is to say there isn't a genetic component to pedophilia? Doesn't mean they don't make choices about their behavior.
It's interesting that scientists say there is a genetic link for obesity, but we still expect people to control what they eat. Why do they not think it appropriate to expect people to control their sexual behavior?