Why don't you have open caskets in Judaism?

Okay, the title is a bit misleading but I have limited characters. I know that it's out of respect for the dead and the whole notion that the dead are unable to look back at you, which is why you also can't eat in the presence. I was wondering if this notion is something that just evolved over time or... show more Okay, the title is a bit misleading but I have limited characters.
I know that it's out of respect for the dead and the whole notion that the dead are unable to look back at you, which is why you also can't eat in the presence.

I was wondering if this notion is something that just evolved over time or if it's something that's been written in the Torah or something.

Thanks!
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