There is no such thing as same-sex parents. For every child, there is one father and one mother.
Maybe in your head, Pollyanna, but in real life, not true. There are gazillions of kids with only one parent, and a lot who have no clue who the missing parent [usually the dad] is, and many who think they know, but were lied to for whatever reason.
There are also plenty of kids with two parents of the same sex, and if you took the time to educate yourself, you might be surprised to find that they are as happy and well adjusted as any other kid.
Welcome to this century.