In a disabled care there are boys/girls men and women. They are disabled and often mentally retarded. So they communicate at a low level, sometimes they are 60 but they communicate and think like an 1 year old. My question is if i can touch them (boys/mens). If they were Muslims then they do not have to pray or fast right?

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Yes there is no obligations on them due to being not of sound mind. However you should adopt precaution and only touch them as much as necessary.