I don’t have the time to Google atm but there’s a growing body of experts shifting to the “it doesn’t actually matter”. Here’s a podcast about it but there are definitely more sources to find: https://www.abc.net.au/listen/programs/lifematters/the-myth-of-good-posture/13864470

I saw another comment in the thread about ensuring you get movement in – that’s what my PT hammered into me.

What? https://starwars.fandom.com/wiki/Sarlacc

Parthenogenesis - egg just becomes embryo, no male required

Jurassic Park - one individual turned from female to male and started making babies