How would gay marriage hurt traditional marriages?

This is part of a week-long dialogue between Robert George and a gay marriage advocate. Today George summarizes his argument against gay marriage, and includes a section on the oft-quoted myth that gay marriage won’t affect the marriages of the rest of us.

According to writer and same-sex marriage supporter Masha Gessen,

Fighting for gay marriage generally involves lying about what we are going to do with marriage when we get there—because we lie that the institution of marriage is not going to change, and that is a lie. The institution of marriage is going to change, and it should change. . . . I don’t think it should exist. . . I have three kids who have five parents, more or less, and I don’t see why they shouldn’t have five parents legally. . . I don’t think that’s compatible with the institution of marriage.

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