Looks like the girls are having a bit of fun up in Twilight’s room… :3
 
Sunset Shimmer: “Seriously? Tighty-whities? Giggle! You’re SUCH a nerd, Twi! Hopeless!”  
Twilight Sparkle: “Yes, yes I am! A HUGE one! Giggle! Good thing I have such an awesome, popular girl like you around, Sunset, to yank my lame undies, and show a nerd like me her place! Giggle”  
Sunset Shimmer: “You betcha! So better get ready, nerd, ‘cause those are totally going over your head in a second!”  
Twilight Sparkle: “Giggle! Oh, yes! Yes! Do it! It’s just what a loser like me deserves!”
 
The Twilight model adapted from a great vector made by AlanDSSparkle