Being a teenager I wasn't allowed to sing the song from Irene Cara, "Fame"... because of the phrase "I'm gonna make it to heaven"...
And 'bless you' after sneezing wasn't allowed either, toasting with a glass of wine wasn't and congratulating someone with their birthday wasn't allowed nor receiving birthday wishes on your own birthday. Oh and don't forget the New Year's wishes... I recall when I was seventeen working at an office and the new year had just started. After a couple of days off we came back in the office and everybody started shaking hands and kissing each other and wishing each other their wishes for the upcoming year... and I just stood there, nearly paralized, hands behind my back, sheepishly smiling and praying they would leave me alone. It was all so embarrassing...