On my rear licence plate surround I used to have "18 TILL I DIE" (name of that great song about not growing up, by Brian Adams)
I saw a sticker on a skateboard once that said "GETTING OLDER IS COMPULSORY, BUT GROWING UP IS OPTIONAL" :thumbsup: :yeah:
On the back of my H2-750 triple, I used to have one of those yellow plastic diamonds which said "CHILD ON BOARD"...took absolutely ages to find one that said "child" instead of "baby"...
on the wall of my garage near the tool board is a sign which has a cartoon picture of a man with his head up his arse, a spanner in one hand and a screwdriver in the other, and it says "FIXIT ORFUKIT GARAGES: * threads stripped * nuts rounded * electrical fires started * free oil drip tray with every engine rebuild".