John: Seriously, I'm getting sick of having to look up acronyms every five minutes. Why can't people just spell out WTF they're talking about these days? shm!.
Simple Harmonic Motion being definition of any object in equilibrium that moves in a sinusodal wave manner across a point of equalibrium (shown by the equation X = Xo+A*Sin(wt). Analogous to malemasturbation, because of its repetitive, sinusodal wave manner of movement.