If you were to tattoo it onto your face, your husband would have more of a leg to stand on, but its completely removable - and thus harmless! I think its wonderful that you are creative, and open to expressing that - if anyone knocks you for it, its jealously and closed mindedness IMO.
Face painting/using makeup for art purposes (rather than everyday 'natural' makeup), or 'dressing up' doesnt ever mean you are a freak, it means you are a creative person (one which should be encouraged!)
I hope you continue to do what makes you happy and express yourself - we only have a certain amount of time to live. We may as well enjoy life and be ourselves - not be put in a box, or be the identical to those around us