Absolutely not. It is a safe and healthy way to use the wonderful thing called “imagination”. A human being unable to be free and limitlessly colorful within the realms of his or her own mind is guaranteed to be stunted in the reality world…and the likelihood of this harming him/herself and others is to one degree or another a certainty.
I think you’re fooling yourself about this being a ‘safe and healthy’ way to use the imagination. It harms you and others…the wife? Did we forget about her. Sad, but true. Marriage is a union, not a contract and not just an existence. Have courage, find reality in a loving relationship with true commitment and intimacy you deserve.