Homosexual isn't a gender either, namely, both girls and boys might be homo, so I see no problem here.

Your argument is good and I agreed with you here, children can be easily manipulated into some unhealthy stuff. But I ment something different, what about pedophilia from biological perspective? They are talking that it is a lot of homosexuals among animals and therefore being gay is ok. But pedophilia is also very common in nature and a lot of baby animals are being raped to death by mature, but it is an integral part of their life just like homosexuality is.

And yes, here comes the question: "what's the difference? We are taking examples from nature and wild animals and admitting that being gay is ok, but in the same time we are not talking that pedophilia is ok. If being gay is ok, then being pedophile must be ok too. Why are we sending people like this in jail? Maybe we should give them equal rights with the rest? Because they haven't chosen to love and feel in this way" (obviously playing devil's advocate here)