Talking Fish...

Every so often, Big D will ask me questions about the various television programming directed towards children and why some things just make no sense. Maybe someone could help me out here, because in trying to answer him, I am actually at a loss for words (this rarely happens, as my friends can attest). These are some of the actual questions Big D has posed to me:

In Jam's beloved "Thomas and Friends," how can trains have a gender?
In "Finding Nemo," why don't the fish living in Australia have accents?
In "Finding Nemo," how do the fish learn how to tell time?
In "The Wiggles," why does the dinosaur speak but not the dog?
In "JoJo's Circus," why does JoJo have a lion for a pet and a frog as a friend?
In "Charlie and Lola," where are Charlie and Lola's parents?

Hmm...