My first thought: the Church. I do not doubt then and today there were and are men of both inclinations, and everything in between. I might make an argument though that today there is a smaller percentage of them than in or around the 15th century. But I feel it is important to keep in mind that people don't change much, 15th century people were just like us; they didn't have the heavy machinery yet, the broader access to education we can shoulder today, but they had the same ingenuity, emotional system, intellect as everyone now. They knew what they had in their spouses, or didn't, they knew when what they were told by others made sense, or didn't. I fear your prominently worthwhile point of willful sacrifice, dutiful, honorable action, which I freely admit isn't the first thing that occurred to me and I thank you for bringing that up because it adds to/refreshes my understanding, will be trampled over by sexist/non-sexist platitudes, due to the framing. :(