Walking, have you been in a school - or any modern workplace - recently?
We aren't creating pens by pulling a tail feather out of a passing goose & trimming it into shape with a penknife - they are everywhere. Pens are cheap.
So as far as I'm concerned, if as a consequence of some mishap you & your pen have got separated, I would rather you took another pen than I had to listen to your story & decide if it's legit or not.
& if you are grandstanding about having no pen when really you just want a chance to go & chat to Jack in set 1 under cover of 'he borrowed my pen before break', then I'd rather you just took a pen.
'Learned helplessness' kicks in when you are mithering on about pens despite having known since September that the thing to do if you can't find your pen, is to take one of the ones from the helpful jar.
I get cross about students who don't have laptop & charger, turn up late, or faff about rather than going quietly to their seat, sitting down & opening a reading book while I take the register.
(I have a shelf of spare reading material too. Just in case someone has had a crow steal there's to build a nest, or something equally implausible ).
By the time students get to me, they are 11 & up & know perfectly well that they should have a pen in readiness for the moment a teacher asks them to write something down. I'd rather they learned from me that they should check for their pen as they arrive; should it somehow to AWOL, fortunately there's a quick & practical solution to that minor problem, & it's down to them to avail themselves of that solution.