A person may have the right to do all these things to themselves without asking permission, however for most spouses they may be very hurt they weren't at least asked their opinion. In actuality, it's not about "asking permission" it's about having respect for the other person, and if you are a couple, it's no longer all about what you want to do. Any changes in the dynamics while in a relationship affect the relationship so you must be willing to handle the consequences that would come from doing some of these things, especially if they are radically out of character for you. It depends on the couple which of these would be out of line, and some might be deal breakers for the entire relationship. For instance, in my case (married 24 years) if my spouse decided to begin using recreational drugs or have a sex change I would not stay. The point is, when married, you care enough about the person to want to discuss these things before doing them.