I'm closer to 40 than 30 and used to tease my dad for sitting to after a surgery he had, but that was over 20 years ago.
"It's like living with all girls!" so the joke went, when it was me, him, my mom, and my sister, arguing over the toilet seat. Jokes on me now.
My bladder used to empty better standing up, but in my early 30s it stopped mattering.
I would poop, wipe, stand up a pee the rest out.
Now it doesn't really matter so I sit just as often as I stand at home; public is stand always.
Partially to play on my phone, partially because standing stopped being better.
So, especially for the graybeards that did it before cellphones, when did you start sitting to pee?
Edit: Just a few points. I still stand ~80 of the time just because it's faster.
But I find myself sitting more often just for the break as I get older.
I'm also a disabled Marine vet with a massively impaired spine, so I didn't want to assume I was the norm. There are skeletons with better spinal health than me.