I don´t care about world. My friend is adopted and he has a complicated relation with his parents. Maybe this problem is not so sharp in the anglo-american societies where is the long tradition of nannies, who can fill the emotional vacuum in normal families. The same holds for the homosexual marriages.

Except a child adopted by heterosexual parents grows up healthy, just like a child adopted by homosexual parents. Scientific study is not "brainwashing".