If you check my other replies in this thread, I've tried to describe why I feel the way I do. But if I may, I'd be curious to hear what you'd consider to be "embarrassing", not as an act but as a personality trait.

As an example, I believe to recall the first time I felt this way as a child, perhaps age 4 or 5. There was some sort of a meeting and somehow a kid felt prompted to go up to the whiteboard and start explaining everyone the Bionicle alphabet (https://bionicle.fandom.com/wiki/Matoran_Alphabet) with unreasonable enthusiasm. I was into Bionicles myself, but remember thinking to myself, "Don't you know how you look like? Don't you know that nobody cares? Have you no sense of how others perceive you? If I hadn't seen how this looks like, would I have done something like this eventually?". I don't know how others brush these impressions away with a "Good for him".