What age is too old to bring a person of the opposite sex into a public bathroom or locker room?

Single parents, at what age do you stop bringing your kid/young adult into the bathroom or locker room with you?

It honestly doesn’t bother me when I see a dad bring his daughter into the men’s room. It’s a bit strange when she looks to be a teenager.
If the gender roles were reversed, say a mom bringing her son into a women’s locker room I know there would be problems if the boy were young as maybe 7 years old?

Anyway I’m just curious how this is handled.

Also has anyone ever challenged you for bringing your kid into the wrong bathroom/locker room?

Thanks in advance 🙏
What age is too old to bring a person of the opposite sex into a public bathroom or locker room?
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