For me, the attraction to one-armed is totally different from how I find one-legged beautiful, and I’m not surprised it is. Much of my attraction is an amputee’s being differently abled, and handling the loss of an arm differs rather fundamentally from the loss of a leg.
Since an arm connects to a hand and hands form the ability to touch and grasp, the amputation of an arm has a major impact on that ability. Every arm amputee in action will remind you just how often you use both your hands, and consquently how much inventiveness is required to overcome the absence of one.
Below elbow amputees furthermore compensate very differently than those amputated above elbow, and I assume both types to have its admirers.
Videos and pictures of one-armed beauties can be found here.