And all these rat tails basically aggregate at the interior of that spherical structure. And what that does is it releases all these water molecules that are initially trapped around that red hydrophobic tail. It releases them and now they can interact in a stabilizing way with other water molecules or with these polar blue heads and that is an energetically stabilizing interaction. So what this essentially does, the reason this takes place spontaneously is because it creates a more stable lower and energy system in which we now have the interactions between these water molecules and these polar heads. Those are the hydrogen bonds. We also have electric interaction between these adjacent polar heads.