2357 Homosexuality refers to relations between men or between women who experience an exclusive or predominant sexual attraction toward persons of the same sex. It has taken a great variety of forms through the centuries and in different cultures. Its psychological genesis remains largely unexplained. Basing itself on Sacred Scripture, which presents homosexual acts as acts of grave depravity, tradition has always declared that "homosexual acts are intrinsically disordered."
There's much more there --- the link will take you to the Catechism in context.
God bless you.
I guess I would say that if even the Church states that it remains largely unexplained then we probably shouldn't make any conclusions or generalizations ourselves. The bottom line is we just don't know for sure.