When " woolly pulleys" came in to the RAF in the early 70's, certain members of the GD branch unilaterally started stitching wings on theirs' ( without , initially any sanction). Hence all the wry comments about "and Pyjamas?", "Dressing gowns?" " PT Kit?" etc.
Other branches ( including mine) and trades later caught on to the "wings" wheeze.
And the rot then set in.......