My mum and stepdad were together three times longer than she was with my dad. She left my dad for my stepdad.
How weird to imagine that the current partner you are with is better than anyone you might leave them for, and that this must apply to absolutely everyone else too.
Like most people in the 1960s, my parents married young and without much life experience. They truly loved each other but they were 19 ffs.
I'm not saying that lying and cheating are ok, clearly they are not. But sentencing people to stay forever in stale relationships rather than act on feelings they may have for someone much more suited to them is regressive and limiting.
My dad remarried to my stepmum, they've now been together more than four times as long as my parents were together. They are the best couple I know, and have sustained through all manner of challenges.
In today's world, my dad would have been my mums fondly remembered first boyfriend and vice versa. But in the 1960s that wasn't the culture, so they did as expected and got married.
As for that shitty, sexist guff about creating a vacancy, how utterly dehumanising.