Wassies have an incredibly strange affinity with eggs (perhaps because they can't lay any) and it is not an uncommon sight at all to see a Wassie with an egg cracked on it.
While most cases involve eggs being thrown at Wassies by small children or Outcasts (for sport) or Wassies' heads being used to crack eggs, a surprisingly large amount of egg-on-face is inflicted by the Wassie itself or its friends.
Wassies love playing with egg yolk and one of the first things a group of Wassies do when they break into a fresh fridge is to grab all the available eggs and start cracking it on each other's heads.