Tweaking behaviors, when it comes to stimulants, are always exaggerated versions of things we are personally concerened about. For instance, someone with a natural streak of vanity is very likely to become a face picker, whereas someone with a natural tendency towards thriftiness are likely to be very concerned about any waste or fallen product. Obviously there is the added complication of drug users simply acting out fiending behavior.
I was always a weed bowl scraper, and concerned about getting every last bit of what ever substance I had because money was alwats tight and supplies always thin. When I got a hold if some meth for tye first time, the twerking behavior was something I expect, didnt understand, and of which I had no real self awareness. So I got down on all fours and scooped up every bit of dust, crumb, detergent and dead bug, and tried them all.
After a while of self observation and understandimg the drug cycle, I came to the point where I could meditate on the following:
There are not enough crumbs that have fallen to get even one good hit. There will never be enough crumbs to make it worth tge effort. I was then able to elevate my gaze from the floor to the table top. Now I straighten up the table when I enter the tweaking stage of the cycle.
Its also one of those things that somw people use as a rationalization to be able to say "I'm not as bad off as those weak minded drug slaves who pick the floor." Chances are if I am saying that to myself, I am blind to the weak minded things that I am engaged in.