It seems to be common knowledge that students act differently (or simply, worse) when they have a substitute teacher, therefore the "substitute teacher effect".
Everyone in the class behaves differently when Miss Smith is teaching.
I think it is the substitute teacher effect
After gooning for hours, I finally produced man cream. The special sauce. My unborn children. Cum. Semen. Sperm. Spunk. Sploosh. Jizz. The sweet substance.