Dipper is considered a huge nerd and Bill likes it. Both 15.

Gravity falls highschool

"Hey Dipping-dots!" Mabel said jumping on her sisters back making her yelp in surprise.

"Mabel get off!" Dipper said making her get off her back "I have some really important stuff in my backpack!" She said looking through her stuff.

"Sorry didn't mean to mess with your nerd stuff." Mabel said smiling wide shrugging.

"Its not nerd stuff it's homework, books, extra glasses, my calculator, and my dungeons dungeons dungeons and more dungeons gameboard." Dipper listed off.

"So. Nerd stuff." Mabel teased making Dipper blush.

"Hey I happen to like her nerd side." Bill commented putting his arm around Dipper who's face gets redder.

"Hey! And thank you Bill." Dipper said kissing his cheek but also punches his arm.

"I mean the glasses make you look so hot." Bill said making Mabel laugh and Dipper frown.

"And she tutors you so you can stay on the swim team." Will said passing by.

"Hey the world needs to see my body its that hot." Bill defended winking at the pine sisters then walked to his brother.

"Dipper your so lucky!" Mabel said shaking her sister.

"What can I say Bill likes nerdy girls." Dipper shrugged taking her backpack and walked to class with her sister.