Marriage, as it has existed for hundreds of years, goes far beyond the commitment of two individuals to each other. It is more about the formation of new families. The parents of marrying spouses eagerly look forward to the arrival of grandchildren after the marriage. The natural family unit has been, is, and will always be, a father (male), a mother (female) and a child. By themselves, gay and lesbian couples are by nature unable to create new human life. For this reason, gay and lesbian couples are not equal to heterosexual couples and their commitment should be recognized in a different legal institution.
Only by intervention of a third party can a gay or lesbian couple even become parents. Third parties include human sperm donors, human egg donors, and surrogate mothers along with the technology of in vitro fertilization. The outcome will be in every case parenting without the child's mother (gay couples) or parenting without the child's father (lesbian couples).
Another downside of this type of parenting is the lack of a role model or mentor for any male or female children born straight, as they grow into adolescence and young adulthood. For the straight son or daughter, the gay or lesbian parenting will provide little or no affirmation for the child's own sexual identity.
E. T. and M.V. Stepke, Linthicum