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Even if the Church wanted to change it, She cannot. With that being said, the Catholic Church has said that everyone on earth was made by God for love, in other words, to love and to be loved in return. And that includes people with same-sex attraction. Everyone was made to be loved. However, marriage is a special institution for a man and a woman who have the ability to pro-create and keep life going on the planet, which is the ultimate purpose of sex and marriage.