In 1982 we lived in North Platte, Nebraska. I was still a Catholic. Trying to to get "right" with the Catholic Church meant my husband had to get an annulment for his previous marriage because, tho he wasn't a RC, his wife had been and they were married in the RCChurch.
Papers and a fee were required to put the matter through the Marriage Tribunal.
We didn't go that route--but that's neither here nor there in this conversation.
But this is:
The RCC assumes something that WTBT society does not. Catholic marriage ASSUMES sexual intercourse as integral to marriage before God. The denial of or the inability to have intercourse is liable in itself to give cause for annulment.
"Go forth and multiply" is part of the divine mandate in Catholic marriage. Shutting down the natural avenue for reproduction is not allowed.
Witnesses often marry with the express plan not to have children. No Catholic true-blue priest would bless such a union--but they would break one.