Levey is part of the "gayby boom" generation. The 29-year-old management consultant is the son of a lesbian couple who chose to have a child through artificial insemination. He's their only child.

Critics of same-sex marriage say people such as Levey will grow up shunned and sexually confused. Yet he says he's a "well-adjusted heterosexual" whose upbringing proves that love, not gender, makes a family.

It damages the children, says Dale O'Leary, author of "One Man, One Woman: A Catholics Guide to Defending Marriage." She says that all children have a natural desire for a parent of each gender.

O'Leary says she doesn't personally know any same-sex parents or their children. That's the problem, some children of same-sex children say. So many people are talking about them; not enough are talking to them, they say.