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Plugs are widely used nowadays. But it’s difficult for weak people, especially the elderly, to use the plugs since their hands aren’t that powerful.XOXO gives a neat solution to this by shaping itself into a tetrahedron. On one hand, it is much easier to use and saves effort. On the other hand, it can reduce the cost of material and technology during the manufacturing process.
Triangle faces pointing to down and up are naturally matched to the move of plugging and unplugging. Users would not have to think too much other than pinch the right faces and plug it easily without much force.