Chatting to a couple of friends the other day, we were discussing how we all have unofficial roles in work - roles that are never in any job description, but which someone has to do.
Mine is "Attender of funerals". When we feel we ought to send someone from the office to a funeral (eg a colleagues mum has died or something), it always ends up being me.
Another friend is the unofficial knot un-tier; if anyone has a knot they can't undo (which seems to happen ridiculously often in his work, as far as I can tell), they come to him and he undoes it.
Another friend is the one who always has hand cream.
What are yours?