What's something you will only do once?

In general i personally only give a warning once, there's no three strikes here, it's only one and depending on what It is, there might not even be one, I think if you have to give more than one warning or chance, you aren't being taken seriously.

I will also only trust someone once, full trust as in undoubtable trust, someone breaks it, that type of trust is unachievable to reach again, these are two of mine, what's something y'all only do once? šŸ¤”
What's something you will only do once?
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