Makes sense to me.
A lot of lesbians have had children the old fashioned way, before they became enlightened about the fact that they were really gay.
Some gay organizations want to make a political statement. Along with lawsuits about gay marriage, some have filed lawsuits about gay adoption too.
Anyway, you ask good questions, questions that the gay activists would not want to answer.
Those questions lead me to believe that homosexuality is a choice. They must chose a lifestyle that conflicts with their natural desire to have children. That is the only explanation that I can come up with.
That said, I could care less what consenting adults do behind closed doors.