I am honestly just curious what people think, it is an interesting topic. I have heard off and on throughout my life this idea about being vulnerable. I was never fully certain what people meant by that. Even in this thread it seems people think of it differently, but no one really goes into details to clarify.
E.g. what are some concrete examples of what would make a man be vulnerable?
In my opinion and in this context the common striped-down-to-its-consistent-core usage is taking the actions that expose one's inner/core emotional space/thoughts/feelings. FWIW I would agree that this doesn't have to be a true vulnerability in the dictionary or any other sense. I think many people talk past each other a lot without knowing it with this word. There is a lot of diversity in specific semantics so good question. The idea that one is vulnerable when one is known seems to encode the victim mindset many get stuck in but that's reality for many. Even when I yack at my therapists for years they still only learn small slivers of my whole person so certainly the broader being is not so vulnerable by sharing just little moments. I think openness is true strength (obvious caveats for secrets like passwords/PINs/et cetera. The contradicting position seems to be that by withholding and looking for opening for attack you position yourself for "winning". In the meantime, it seems to me, you lock in isolation and losing, missing your opportunity to connect, learn, and grow increasing your vulnerability over time. Busy night, rushed through writing so hopefully not too many errors or stupid thoughts.
[edit: Giving up control seems to be a common feature. Maybe more simply being willing to cooperate when your interactant could defect.]