I never understand why people tell us to go against our natures, against who we are. Good idea or not, it was who you are and you were being yourself. Anyone expecting you to be otherwise either doesn't know you at all or they want you to conform to an idea of what they think you should be. I'm sorry, not everyone fits into a perfect little box of behaving according to the rules all the time.
As long as he doesn't make comments to others about the rehearsals, that shouldn't really be a problem, hopefully. If you kept the red hair with the green skin, you would be the walking embodiment of the Christmas season.