It does my fucking nut in!
I go to work with two...often come home with one & end up chasing it down to someone in First Aid the next day who is happily using it.
I take a flamin' pencil case to Rainbows and Guides so I have everything I might want. One of my other leaders literally brings herself...every week...borrows a pen...and makes it disappear ffs...& then when I ask about it says "oh yes, so I have" but they never re-appear.
I'm down to one pen now.
& yes, I know they're cheap as chips, but ffs BUY YOUR OWN BLOODY PENS! I buy the ones I buy specifically because I struggle to write with some shapes of pen (circular ones in particular I'm a fussy fucker)