Ok, several corrections of common misconceptions and one BIG question in this post:
Regarding the Roman Catholic Church, I believe it was Backseat Boohoo(?) whose gradfather was excommunicated for marrying a Protestant who would not convert. It was probbly true in our grandparents' time, but the Catholic Church has changed its position regarding marrying members of another faith. Catholics are free to marry non-Catholics with little difficulty, PROVIDED they agree to raise any offspring from the union in the Catholic Church. It's not a great improvement, but beats excommunication.
Also, the Church has now scantified having sex simply for pleasure, and not only with the purposes of conceiving children. You're still not allowed to PREVENT conception, but it doesn't have to be the only reason to have sex, if medical conditions or something make conceiving unlikely. I believe couples who are physically incapable of having children can still get married in the Church, but it requires a special dispensation from the Vatican; I suppose, theoretically, miracles can happen if it's God's will or something. The Catholic Church can and will grant an annullment it, at any time, either member of the couple claims they never intended to have children.
I've been married 17 years (for now), but since I was married by a Justice of the Peace, my marriage is not sanctioned by the Church, and I've been living in sin for all these years. Well, in addition to my generally sinful existence. Plus, we never intended to have children, so my heterosexual marriage is not only not acknowledged by, but considered sinful, by the Catholic Church.
Actually, I answered my own BIG question by doing just a little research. I was confused regarding how consummation applies in gay marriages. I was under the impression that a marriage was not officially legal until it was consummated, and that the definition of "consummation" was still the first instance of post-marital sexual intercourse, legally defined as penile penetration of the vagina. Apparently, though, the legality of marriage is now based upon consent, not consummation. Sorry--I think PA, where I grew up--was pretty far behind the curve regarding sexual laws and definitions. HOPEFULLY it's changed by now, but if I remember correctly, when I was 21, anything EXCEPT the male penis penetrating the vagina, from a face-to-face position in which the man was 'on top,' was actually illegal.