During this long discussion, same-sex marriage proponents haven't said anything (that I'm aware of) about the need for boys and girls to have male and female role models respectively. In the article "Growing Up With Two Moms: The Untold Children's View," a boy (Robert Lopez) who had that experience, tells his story.
Excerpts: "Quite simply, growing up with gay parents [lesbians] was very difficult. . . . I was confused. When your home life is so drastically different from everyone around you, in a fundamental way striking at basic physical relations, you grow up weird. I have no mental health disorders. . .I just grew up in a house so unusual that I was destined to exist as a social outcast."
"My peers learned all the unwritten rules of decorum and body language in their homes; they understood what was appropriate to say in certain settings and what wasn't. . . ."
"Even now, I have very few friends and often feel as though I do not understand people because of the unspoken gender cues that everyone around me, even gays raised in traditional homes, take for granted."
"Forty-one years I'd lived, and nobody--least of all gay activists--had wanted me to speak honestly about the complicated gay threads of my life."
I'm not saying that Mr. Lopez's experience is representative of all boys' experiences who are raised by lesbian parents. I
am saying that appropriate role models are important for boys
and girls. How does a girl, for example, learn to be a wife and mother if she is raised by two male gays?
http://www.thepublicdiscourse.com/2012/08/6065/