The script most men were handed
The version of masculinity you were probably taught had a clear set of rules. Don't need too much. Don't show fear. Handle it on your own. If you have to feel something, feel it later, alone, somewhere it won't get in the way.
That script worked for a particular world. It probably kept some of your grandfathers alive. It built things, ran things, held things together when there wasn't space for anything else. It had its place.
The thing is, your nervous system was never on board with it. Your body, like every human body, came into the world wired for connection. The longing for closeness, for being seen, for not being alone with what you carry, that's not a malfunction. That's how you're built. The script told you to ignore it. Your body kept sending the signals anyway.
So you grew up trying to do an impossible thing. Be a man, by the script's definition, while having a body that needs the very things the script told you not to need.
Why this hits anxiously attached men hardest
Anxious attachment is, at its core, a heightened sensitivity to connection. The body learned, very early, that love wasn't reliable, so it stays alert. It scans. It works hard to keep the connection it has.
Now layer the masculine script on top of that. A man who's already wired to feel things deeply, in a culture that told him not to. So he learns to perform. To hide the scanning behind competence. To dress the longing up as drive, or moodiness, or being the strong one in the room.
It works for a while. It usually breaks somewhere around midlife, or in a relationship that gets close enough that the system can't keep itself hidden, or in a quiet moment when you realise you're surrounded by people who don't actually know you.
That moment, the one where the performance can't hold any more, is often where the real work begins.