To those in stable, loving relationships, is your hand on top or in the back when you hold hands?

To those in stable and loving relationships, do you keep your hands on top when you hold hands with your significant others? or is it the other way around? or do you switch?

On the contrary, if you are/were in an unstable/unsuccessful relationship, how do/did you hold hands?

I have been noticing an interesting pattern and I wanted to see if it does apply. Or it’s just some random coincidences.

Edit:

To clarify: This could be a mere coincidence, but I know a few couples (the wife/gf often had her hand on top or in front when they held hands) where the husband/bf turned out to be a cheater or a shady person overall. That’s why I’m curious.