Dreaming of a fetish means you are incomplete for not being able to enjoy what you like in the open because it is not considered normal. You can only embrace the fetish in secrecy for the fear of being found out and persecuted.
If you indulging in a fetish while dreaming, it often means there is something that is bothering you, but that you have not been able to get out. Perhaps this thing is something personal or even embarrassing, which might be one of the reasons why you cannot speak about it openly.
It may be time to trade in the fetish for a new hobby that is more acceptable.