A small gluteus does fine at positioning the hip bone for tree climbing, but not for walking...
A baby's weight doesn't really change when they fall asleep, so why does the limp, floppy weight of a sleeping baby seem greater than it actually is?
In fact, there are several reasons, the major one being that telephones completely remove any visual cues from the process of communication. Not only do we read emotional content off the posture of a speaker’s body and face, but language comprehension is aided by a subtle form of lip reading.