What does a smiling black snake thing have to do with SICP?

Would someone please explain this to me?

Also what have Abelson and Sussman to say about "twohoos" reading SICP?

Explain the following:

https://mega.co.nz/#!o1QimLKD!JPKsMBiCwcBm5Qn_xtULSS-hPxocAlq6HQGpCM5Lbg4

Also, why can't I find a good quality version of the picture featured here?

https://www.youtube.com/watch?v=aHk42kDwesM

I think it comes from /jp/
we used to have a lot of fun on dis.4chan and eventually crossboarders from /jp/ invaded, stole our culture and started shopping SICP onto pictures of touhous holding books. It was fucking disgusting. Those were some of the worst times, the beginning of the end before our memes reached /g/.
Anyway at some point they were doing multiple post pictures (you know?) of a kodomo no jikan girl with a long arm and the hand was a snake and it said "have you read your sicp". I guess that stuck.