YOU SAID:
I hate school because i get unwanted erections in class
INTO JAPANESE
クラスで不必要な勃起をするので学校が嫌い
BACK INTO ENGLISH
I hate school because I make unnecessary erections in class
INTO JAPANESE
クラスで不必要な勃起をするので学校が嫌い
it is unlikely that this phrase will ever reach equilibrium