How Sasuke and Sai became good friends

Sasuke and Sai had stared at each other when they first met; Sakura and Naruto on the sidelines watching. Sasuke and Sai were both emotionless though you could see curiosity and an assessing looking in their eyes.

"I don't see how you beat him, Naruto," Sai finally said, tilting his head in what could be confusion. "He clearly has a VLD."

Naruto and Sakura frowned. "VLD?" they asked.

Sai looked at them. "Very large dick," he said in a 'duh' tone.

Sakura swooned while Naruto blanched. "WHAT?!"

"Hn." *smirk*

And that is how Sasuke and Sai became good friends.