B's teacher caught me at one of Z's last soccer games.
She said that one of B's friends came running, shouting, to her across the room "B just said SHIT". She calmed him down and tried to divert attention from the word.
She approached B and asked if he had used a bad word.
He said "Yes".
As she admonished him to make better choices, he said
"BUT MY MOMMY SAYS IT ALL THE TIME".