I've heard this before, but it just appeared on facebook so I'll share it:
A primary schoolteacher explains to her class that she is a Dragons fan. She asks her students to raise their hands if they too, are Dragons fans. Everyone in the class raises their hand except one little girl.
The teacher looks at the girl with surprise and says,
"Mary, why didn't you raise your hand?
"Because I'm not a Dragons fan, " she replied.
The teacher, still shocked, asked, "Well if you are not a Dragons fan, then who are you a fan of?
"I am a Sharks fan and proud of it, " Mary replied.
The teacher could not believe her ears. "Mary, why are you a Sharks fan? "
"Because my mum is a Sharks fan, and my dad is a Sharks fan, so I'm a Sharks fan too!"
"Well, " said the teacher in an obviously annoyed tone, "that is no reason for you to be a Sharks fan. You don't have to be just like your parents all of the time. What if your mum was a prostitute and your dad was a drug addict, what would you be then?
Mary smiled, and said...............
"Then I'd be a Dragons fan.