I know a few moms whose middle school aged sons taught them how to curse. Fortunately, my son was never able to shock me with what he let fly. However, my then 8th grade aged son was standing with his age-mate cousin while my dad was working on his truck. Dad cut his hand and got smacked in the head on a part that came flying loose unexpectedly. The stream of invective he let loose left those boys eye-poppingly flabbergasted!