Pikachu is the world's most confusing fictional animal

This is the question everybody wanted to know since the start of the Pokemon series. How can you tell if a Pikachu is a boy or girl? You know people have arguments about this. You can't tell which Pikachu is a boy or girl if they stand next to each other right? They both sound alike and they both only say one word, Pikachu. If you have a conversation with a Pikachu it will sound like this:
" Hey Pikachu what do you wanna eat tonight?"
" Pika pika pikachu."
" So you wanna eat pizza right?"
" Pika."
" Cheeseburgers"
" Pikachu."
As you can see you can never know what Pikachu wants. well the Pikachu that Ash has is a boy. Weird that he doesn't have the male reproductive organ.