One day Goku and Bulma sat in the living room at Capsule Corp watching TV and eating popcorn. During a commercial the phone rang and Bulma leaped up and answered it.
"Hello, Bulma Briefs speaking." Bulma said happily.
"Yes I was wondering if you would answer one question for me...." A voice said on the phone.
"Why sure if it won't take too long." Bulma replied.
"Do you like... girls?"
"What?" Bulma said a little confused. The voice sounded a little familiar she thought. "Well... I have girlfriends... like Chichi. We go shopping all the time."
"Hah! I knew it! Lesbian! Pay up Oolong!" Master Roshi said.
"CREEP!" Bulma shouted in that annoying loud voice of hers. She slammed the phone down angrily.
"Hey Bulma who was that?" Goku asked as he picked popcorn out of his hair. (We all know that Goku can't eat anything without getting it all over himself.)
Bulma sat down and sighed. "Just Master Roshi. He called me a lesbian. Annoying pervert."
Goku blinked and stopped picking popcorn. "A lesbian? What's a lesbian?"
Bulma looked at Goku. "You don't know what a lesbian is?"
"No.... is it a type of food?"
Bulma sweatdropped. "No. A lesbian is when a girl likes a girl."
Goku's face brightened. "I like girls! So I'm a lesbian!"
Bulma sighed. "No Goku. You have to be a girl to be a lesbian."
"But I like girls Bulma. Just not like Master Roshi does. So.... can I be a lesbian?" Goku asked trying to look thoughtful.
"No Goku! Are you a girl?" Bulma asked, starting to get annoyed.
"Let me check!" Goku said and started to pull his pants down.
"AHHHHHH!" Bulma screamed. "No, No, No! We'll just say you're a lesbian ok?"
"Ok!" Goku said happily as he tied the sash on his gi.
And that's how Goku became a lesbian.