Don’t be silly it’s fun reading all the different answers people come up with, so just enjoy these posts.interesting. question. It doesn't say what it sticks to, or how it sticks, which opens the door to a few options:- A magnet sticks to many metallic surfaces - it does NOT stick to pure gold. Velcro sticks, but is not sticky.- just try getting it off a hairy wool jumper. Of course geckos stick well to walls (didn't rule out living options!) AND then there are the chemical stickies. Water is considered to be a sticky liquid the strong polar bonds between water molecules create a electostatic force that packs the water molecules closely together and adheres the molecules to each other - it is considered to be VERY cohesive. With four hydrogen bonds (tetrahedral bond) it is considered to be the greatest cohesive liquid. You really need to limit this question!