A 7 year old and a 4 year old are upstairs in their bedroom.
"You know what?" says the 7 year old, "I think it's about time we started swearing."
The 4 year old nods his head in approval.
The 7 year old says "When we go downstairs for breakfast I'm going to swear first, then you swear after me, OK?"
"Ok" the 4 year old agrees with enthusiasm.
The mother walks into the kitchen and asks the 7 year old what he wants for breakfast.
"Oh, shit Mum, I s'pose I'll have some Coco Pops"
WHACK!! - He flew out of his chair, tumbled across the kitchen floor, got up, and ran upstairs crying his eyes out. She looked at the 4 year old and asked with a stern voice,:-
"And what do YOU want for breakfast, young man?"
I don't know, Mum" he blubbers,"but it won't be fucking Coco Pops."