One of the claims made on behalf of "marriage equality" is that same-sex couples raise children just as well as opposite-sex couples. This has been proved by rigorous scientific study after rigorous scientific study--if, that is, one considers convenience sampling to be rigorous science. So, if same-sex couples raise children just as well as opposite-sex couples do, it follows that the sex of a parent does not matter. Fine. Then we should stop using the words "mother" and "father" because those words imply that a parent's sex somehow matters, and such a proposition is nothing but unscientific bigotry.
Furthermore, if sex does not matter in regard to parenting, then in what regard does it matter? It can matter only for one's private sexual preferences, n'est-ce pas? Therefore, parents should not use gendered pronouns to refer to the children they raise. For it is just sick for parents to treat children as objects of sexual desire. The use of gendered pronouns, in fact, constitutes child molestation. For, again, if sex matters only for one's own personal sexual desire, then it is simply wrong to use gendered pronouns with children, thereby labeling these innocents as objects of adult desire.
Gendered pronouns should be used only in private between consenting adults.