Classic clothing has the button on the left side for women and on the right side for men. The reasons for this are unclear, but the choice for men's clothing is usually attributed to the need to draw weapons from the left to right; the weapon would then not catch on opening of the clothing. For women's clothing the common reason given is that in times when upper-class women's clothing was quite elaborate, servants were needed for dressing, and the left placement of the buttons was more convenient for right-handed maids. Some Jews reverse this, following statements in the Torah that favor dressing first on the right side, or from the Kabbalah, in which the right side denotes goodness.
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