daeshine
When the teacher and student are so into each other they forget the difference between a crescendo and a curse.
My violin teacher and I had daeshine during the final exam. We forgot to play the song and just kissed instead.
The piano teacher and her student got daeshine in the music room. Now the piano has a lipstick stain and a broken key.
During the concert, the cello player and his teacher had daeshine. The audience didn't clap, they just stared in horror.