YOU SAID:

stupid stuff is fun so is doing stupid things

INTO JAPANESE

バカなことは楽しいからバカなことをするのも楽しい

BACK INTO ENGLISH

It's fun to be stupid, so it's fun to be stupid

INTO JAPANESE

バカになるのが楽しいから、バカになるのが楽しいんだよ

BACK INTO ENGLISH

It's fun to be stupid, so it's fun to be stupid