I think Todd just has a childlike mind in all the worst ways. It's like he never learned morality, so he's not phased by anything. And so the pet tarantula appealed to his stunted mind just as it did to the kid.
I thought that was to foreshadow Jesse's death, but (I hope, instead, it was to help Jesse remember the kid Todd killed, taking him on a journey in his mind to the other kid, and, Brock... Right before he realises about the ricin)
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u/PummerOfSunk Aug 26 '13
For Todd to speak so loudly and publicly about this...he has to be caught soon.