The normally staid Western Wall became the scene of a bizarre spectacle Sunday afternoon, after an unidentified 23-year-old Jewish woman was arrested in the women’s section for completely disrobing and attempting to pray at the holy site.
According to police spokesman Micky Rosenfeld, the Israeli woman took off all of her clothing shortly after arriving at the women’s section at approximately 3:30 p.m.
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According to the Book of Genesis, Adam and Eve were naked when G-d created them. Perhaps she merely was trying to get closer to Him.
Or perhaps she was preparing for the mikveh (ritual bath for purification):
In any event, I don't believe that taking off one's clothes is a "mental illness".