I understand the angle that Harryji is approaching this from.
I am brave enough to admit that i have the same weakness where i would have to say 'no' or it gets to a point that is past the limit.
Let's be frank and honest here-
Firstly, this imposing of a 'limitation' is all about tolerating, meaning 'how much would you tolerate?'.
Let's just say your partner,fiance or wife decides to just let it all go and grow.
Then psychologically i would start monitoring it (unintentionally).
I know that some men out there would too, even though they will claim it's absolutely fine and they would try very hard to be All accepting.
For me, there would come a point where i would have to say 'enough!'
- this would be the full sideburns, goateee, arms and legs. (like the popular girl last year that was named Balpreet, I think!)
The scenario that came to mind when i first answered the question to myself that coincidentally helped me discover my weakness was as follows-
-Now, I am already married to my wife of choice but I remember some of my friends 'doing the rounds' as I would call it. This was when their families would try and arrange meetings with prospective partners for future marriage and i remembered one who was rather confused with a girl because of her little tache and goatee (especially when she made it clear that she was NOT shaving!)
Anyway, I simply imagined myself in the same scenario where one would have to choose between two prospective girls.
Let's say that a choice had to be made between two girls that had EXACTLY all the same appealing qualities otherwise in terms of physique,intelligence, education, looks..etc.. BUT the ONE HUGE Difference was that the One had excessive facial hair and the other had nothing visible at all..........perfectly smooth and clean......
You see what I'm getting at here ??
Personally, it wouldn't take me too long to consider the non-hairy one with an immediate decision. In fact, i hate to admit, but i would probably even sacrifice a few other extra qualities on the hairy one just so that i get the clean smooth hair-free features !!
I know this borders on being prejudice and not accepting, but It's a weakness that i shall have to try and conquer. Maybe it's just the way i have been raised with the glorifying features of my maya surroundings, but i'm sorry to say I can't help it.