Back in middle school, I had this teacher who may or may not have been in a permanently-altered state of mind, a residual effect of indulging in the more glorified "recreational activities" of the 1970s. To protect the innocent, we'll call him "Mr. Davids."
Mr. Davids always meant well, but he was still a bit of a strange cat. When trying to teach us how to study, he cited the KISS acronym as something for us to keep in mind.
This is where the aftershocks of those recreational activities come into play. KISS, in its usual state, stands for, "Keep it simple, stupid," telling the audience not to overthink things.