Twilight Sparkle is always curious of learning. learning ANYTHING! She finds a book full of tips on sex, and she reads on how to enjoy "pain" When Rainbow Dash stops by, she does Twilight a "favor"

PS: ALL CREDIT GOES TO MY FRIEND COUCH FOR MAKING THIS

*EDIT*
"Come on baby
Make it Hurt So Good
Sometimes Love
Don't feel like it should
So baby
Hurt So Good..."