well they see what their peir does just like us humans and they copy it. their is no known fact from where they decided to do what they do. but that is how they learn.
The vampire squids have two tentacles which are referred to as their retractile filaments. Also, Vampire squids have 8 arms.
Kind of.
The same as most squids do - backwards.
No
no
No they do not.
Yes
in your imagination.
no
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No. There is no such thing as "Vampire squids", at least not land-dwelling ones that would go into a McDonald's to eat hamburgers.
Squids do not have backbones.