When do you think fat shaming is justified?

When do you think fat shaming is justified?

Many men and women are getting fat today due to many reasons.

When I tell my fat friend that his dick is small just because he is fat, he took it positively. Now he is hitting gym.

I told a girl that she is fat. She should hit gym. She started scolding me.

When do you think fat shaming is justified?
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