Can. 1096 §1. For matrimonial consent to exist, the contracting parties must be at least not ignorant that marriage is a permanent partnership between a man and a woman ordered to the procreation of offspring by means of some sexual cooperation.
Can. 1101 §1. The internal consent of the mind is presumed to conform to the words and signs used in celebrating the marriage.
§2. If, however, either or both of the parties by a positive act of the will exclude marriage itself, some essential element of marriage, or some essential property of marriage, the party contracts invalidly.
Can. 1102 §1. A marriage subject to a condition about the future cannot be contracted validly.
You are wise and I thank you. I am gratified that nobody on FR can see my tears.
Ah, I see you were more ambitious than I was and dug up the actual canon. ;-)