....where do all the bums go ?

.........my missus made an unsettling remark to me the other day when I was trying on some new shorts that .....'you've got no arse !'
.....I'm positive I had an arse the last time I looked......
.........and what about all those old blokes gettin' around with no arses.......

.........which brings me to the intriguing question :-
....'WHERE DO ALL THE BUMS GO ??!'

........is there , like a legendary graveyard for all the lost bums ?
.......or maybe they there's a secret society of old bums?
......any ideas ??

.......intriguing.............
........................................*ping*