"The Australian Christmas" joke

Here comes Santa Claus, here comes Santa Claus,
Sweating his fat away
Here comes Santa Claus, here comes Santa Claus,
Water-skis on his sleigh
Never have a white Christmas
When you in Melbourne live
Wearing hot pants on the beach
When you your presents give
Here comes Santa Claus, here comes Santa Claus,
Sweating his fat away
Here comes Santa Claus, here comes Santa Claus,
Water-skis on his sleigh
Chestnuts roasting on the sidewalk
Castles in the sand
Eating ice-cream, having good talks
Warm Christmas, isn't that grand?