At what age should a mom stop taking her son in the ladies restroom?

At what age should a mom stop taking her son in the ladies restroom?

This can also go for dad/daughter taking into the guy restroom even tho that is much less common then moms doing this with their sons.

My oldest son is 8 and I still take him in the ladies restroom with me. I think it's too risky where I live to allow him to go by himself into the guys restroom. But I'm not sure what age I'll start allowing it maybe around 10ish or whenever he has a phone and can call if something goes wrong.

At what age should a mom stop taking her son in the ladies restroom?
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