Is it ever okay or realistic to put timelines on your relationship goals?

Is it ever okay or realistic to put timelines on your relationship goals?

Is it ever okay to put timelines on your relationship goals which technically sort of turn into ultimatums. For example, you want to get married by 25, or if your SO doesn't want kids by 30, you're breaking up?

Is it ever okay or realistic to put timelines on your relationship goals?
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