Funniest joke

Little kid walks into a taxi and sits right behind the driver and
starts
yelling,
''If my dad was a bull and my mom a cow I'd be a little bull.''
The driver starts getting mad at the noisy kid, who continues with,
''If my dad was an elephant and my mom a girl elephant I would be a
little
Elephant.''
The kid goes on with several animals until the taxi driver gets angry
and yells at the kid, ''What if your dad was a drunker and your mom
was a prostitute?!''
The kid smiles and says, ''I would be a taxi driver!''