30 years ago I saw stats on UK divorce that were 30% of marriages end that way, and 50% of second marriages.
As one GF long ago opined "people gravitate to the familiar", so if it was wrong first time, it is more likely to be wrong the next time.

but

My latest pair of boots were identical to the pair I was wearing, and the same as the previous ones. How's that for gravitating to the familiar? Partly, I say in my defence - because COVID precludes trying them on, in the cheapo store I frequent. And despite the cheapness, they are water-proof ish. Which was not the case at a supposedly up-market Store at the same price! So gravitate is sometimes an analogue for experience.

I had a really nice biscuit at 11am and I am gravitating..........................