I’ll go first: “You have to have children when you’re young,” told to me when I was in my late 20s, with no desire to ever have kids, and no means to support them, by someone divorced multiple times with at least one adult child who does not speak to them.
Also: Responding to “How do I deal with this problem?” questions with “Oh, don’t worry about it, it’s enough that you’re even thinking about it!”
When I would have a problem with my body like shoulder impingement and ask for advice, I would often be told by people “nah, you’re too young too have that”
My wife (in her 30s) got shingles and doctors / people at the pharmacy said the same thing. “only people over 50 get that!”
She was in a lot of pain. 0/10 would not recommend getting shingles.
Strange, my friend got that when a teenager and doctors said yup, that’s chicken pox round 2, makes sense.