Things which you allow to yourself are also allowed to others. For example, if you drink beer, you will not judge your friend because he is drinking beer. If you wear short skirt, you will not gossip your friend because her skirt reveals her underwear. We are humans, and sometimes we move our limits into unknown directions.
Double standards are the worst failures in one relation. Although you are jealous person, it will not stop you to flirt around. Handsome colleague from work, your charming boss, your sexy neighbor, even this new salesman, they are all opportunity for flirting. Now, you have husband, and your business is to play role of private agent, by digging into his pockets. Does he cheats you? Maybe his schoolmate is also partner in his bed. He can't do this to you. Now, when he asks you, why you are blinking to all handsome men , you will say "But that is my right."
Things are always different from selfish perspective. It doesn't look such bad when you are doing something what is not appropriate. If you are boss at work and if you skip deadline because it was not your day, this is something which must be forgiven and forgotten. Well, what if your worker do the same thing? You would yell as lunatic, they would be fired without recommendations.
Where are roots of double standards?
Person is spoiled in childhood. Some parents will let all to their children, they will not have limits, as they had many toys and they took rights to play with other dolls and teddy bears, they will play with other feelings, but their space will be locked and protected.
Person is selfish. When you are selfish, you can't feel mercy or guilt or responsibility for others. You don't give a shit for other problems, because it is not about you.
Person is old fashioned. This happens in men world. Some men think that meaning of real man is real boss. So, he can cheat, flirt and break hearts, but his beloved wife will wait him at home, with warm dinner.
Person is coldblooded. If you are not sensitive, you will not hear what others want to say to you. You cannot feel that you harm someone, that someone is crying because of what you did. This is not a part of your program.
Double standards make confusion in every love relation. This is discrimination of rights, because one person will take everything and other half will be prisoner, in invisible cage.
When Chad and Kurt talked about some girls, they made good example of double standards.
Chad said: "Mona is a slut. She was kissing me at first date, second date i fucked her and what to do later?"
Kurt asked him: "But why did not you tell her that you don't want this?"
Chad replied: "What, i am not crazy. I like to use sluts for hot sex. I will not marry her. If she can't get it, she is also stupid."
If you are victim of double standards, check your priorities. Maybe you stuck with someone who holds the key of your freedom. Now you can't talk with friend, tomorrow you will not have permission to get out from your house, and next day your windows will be locked, for any case.