Why GaaLee
After the 2 years and some months hiatus after Naruto trained with Jiraiya, Gaara and Lee were together.
"It's because we...balance each other." Gaara answered.
"Oh I know why!" Naruto raised his hand.
"Naruto, this isn't a ninja classroom, but proceed." Kakashi
"Because Fuzzy Eyebrows has a 2 inch eye brow and Gaara has no eyebrow so if they get together their babies will get normal eyebrows!" Naruto stood back and grinned, as if presenting the answer to the world's mystery to them
Lee's 2-inch eyerbows twitched. And even Gaara's non-existent ones as well.