Whenever rules apply unevenly to different people, there is potential for trouble, resentment and jealousy. (Ironically, double standards are often instituted as a way to prevent jealousy, at least within an established relationship, but far more often they end up creating it.) Rules that codify a double standard are disempowering. Be careful with rules that create double standards—both in setting them and, if you’re starting a new relationship with someone who has them, in agreeing to them.