The peaked cap is a classic look for dominants of both sexes. For female dommes it’s up there with leather corsets, boots and snarling expressions as clichéd elements of the ‘look’.
Personally I was never much of a fan. It struck me as just too stereotypical and ripe for parody. However, having done a session with a domme wearing one, I’m beginning to warm to them. It wasn’t something that I’d requested. I’m not a fetishist and I’m always happy for the dominant to choose and wear whatever she feels like. It even provoked a smile from me when I saw her with it, but in the scene it definitely added something and pushed some of my submissive buttons.
I’d always assumed that the power of the idea came from the military association. Officers wear them, and officers give the orders. There’s definitely an aspect that carries through from that. But I also wonder if there’s something more basic about the design. The horizontal line of the cap helps emphasize the line of the eyes, framing the face and pulling the attention to the wearers gaze. It also hides the softer hair and squares off the head, creating an aggressive profile. It even offers the wearer a degree of control over what they reveal, helping to shield their face is they so desire. I’d always though the military adoption had been an accident of history and BDSM had simply borrowed the psychological aura that came with them. Perhaps there’s actually something more fundamental about the design that makes it work well for both groups.
This is the model Kay Morgan in a photo shot by phoebus-photos. You can see her in a different angle from the same shoot here. I found the above shot on the S.I.N. tumblr.