He never said not to tell anyone but he brought up several such details while we were working together. The information wasn’t really helpful for anything in that it wasn’t relevant to our work (making software).

I never revealed the info because it was said in confidence. But we weren’t really that close so it stood out to me.

My example was made up but the actual factoids were about medical issues and bodily functions. It wasn’t creepy or anything just not something I would want widely known.