Mouth

Troy has officially discovered that everything can go into his mouth. I know psychologists call this the oral stage, but I wonder if anybody but a baby really knows why they do it. Are they tasting everything, learning textures and shapes, or is it more basic...are they just sticking things in their mouth, because where else would you put blankets, facial tissues, onesies, pillows, feet fingers (a.k.a. toes), and hand fingers (a.k.a. fingers)?