>>259067
Looking through the Summa, I saw this concerning marriage:
>marriage is not essentially the carnal union itself, but a certain joining together of husband and wife ordained to carnal intercourse, and a further consequent union between husband and wife, in so far as they each receive power over the other in reference to carnal intercourse, which joining together is called the nuptial bond.
But I can't seem to find anything about what Aquinas thought "carnal intercourse" should be used for.