Vices gained by governors who stay put

I don't play MTW anymore because I suffer from the mouseover bug on the battlemap. Although I did go on about improvisation, and have found a way to fight battles and not auto-resolve, I just didn't feel like playing a game that shouldn't have been broken like that in the first place...

I still visit these forums, though, and I have noticed there's now a mythbusting team around the Main Hall. This made me think to propose a possible test. It has long been accepted that, if you have a governor and leave him put in a province, he will gain vices such as Hedonist. You have to move him around every turn to prevent this from happening (I will stress this is in relation to the early game, once you have a large empire and a lot of money in the bank, it is probably a given no matter how much you move your governors around).

I once noticed the exact opposite of this. A long time ago, on a computer far, far away...

It was in the Early Era, as Aragon. Possibly a mod installed, likely to be XL. Early in the game, too. I was moving my governors (incidentally, Urban Militia - they had the best stats to justify their governorship) around to prevent them getting the aforementioned vices. And, like clockwork, they seemed to get these vices. When I left governors alone, they didn't seem to gain them so easily. I am asking if a test could be devised to figure out whether or not you HAVE to move governors around to stop them from getting certain vices, or if it might be something else interfering, because I was moving them, and they still got them...

This also reminds me of the time I played as Scotland in XL. Northumberland was a death trap for vices. Somehow, every governor there seemed to become inbred or something else over time. Every single one of them. Over about a 100+ years or so, two or three of them...the same exact vices...

You might have to take other factors into account such as:

- is the governor's unit alon or included in a stack ? As far as I know, learders of units that remain on their own do not get any V&V (other than the one gained through specific actions - builder, steward, scant mercy, ectc.)
- is the king present in the province where the governor stays put ? It seems to me that governor remaining in the same province as their king do not get V&V as often as the ones that are in another province. I do not say that it never happens but after playing many campaign as Danemark (during which you usually only can conquer Sweden and Norway in first twenty/thirty turns of the game), I have a the impression that there is actually a connection (govenors in Sweden and Norway get normal v&v, while the one remaining in DK with the king hardly gets any at all). Same thing happened with the Sicilian, governors and princes in Naples do not get V&V while the king remains there but if he is moved to Sicily, V&V start appearing.