According to wiktionary.com "What's good for the goose is good for the gander" is from earlier "what's sauce for the goose is sauce for the gander" (1670s). Other early forms include “as deep drinketh the goose as the gander” (1562) which literary translates to "What is good for a woman is equally good for a man; or, what a woman can have or do, so can a man have or do" "if something is good or acceptable for one person it is therefore good or acceptable for another person"

Apologies in advance to the ladies men that might read this, its not ALL about Sexism but just some experimental truth.

I have experienced so much in life and established that life does not treat us equally. If each and every one of us, no matter which society we grew up have considered every phase of our growing up, we would have noticed that life has not treated us equally.

When a Lady sleeps around its termed negative, when a man does its termed positive.
When a Lady is sexually assaulted by opposite sex its big issue, when a man is sexually assaulted by opposite sex its no big deal.
When a First class graduate fails to get a job, and a Pass class graduate gets a job easily the society is not fair.
Its normal for a man to walk his ways to the top, but if a ladies does its an exceptional ability.

The list can go on and on, but its the reality we have to deal with.

What's good for the goose should also be good for the gander, but in the world we are today that's not always true.

We just need to deal with how life treated us and hope "fairness" will always play it's role.