Materials for anal beads, like all sex toys, vary widely depending on where you buy them. Simply put: Do not buy cheap, crappy sex toys. If you buy beads made of jelly or non-ABS plastic (the only non-porous grade of plastic) then you risk leaving bacteria behind. These materials can never be fully disinfected. Yes, this is exactly what it sounds like: Your anal beads will have lingering poop on them.