Catholics go through pre-Cana before marriage. It is supposed to help hou learn what marriage means, if you and your spouse want the same things... But sometimes people don’t seriously put into it what is needed. They are blinded by love or lust and will go through it only because it is required, ignoring the warning signs of trouble ahead. People will lie to themselves and others to get what they think they want.
Both my wife and I had been widowed when we met. She was then 61 and I 69. The priest that married us had to go through the same routine as for all weddings. When he asked us if we would accept any children God sent us, we just looked at each other and laughed. We marked YES on the form.