I pity those who are not interested in engineering and who cannot discern the sinusoidal motion on the part of the subject. Those of us who are interested, on the other hand, take delight in burying ourselves in such fascinating research.
Describing simple harmonic movement For Engineers:
V
V For Non-Engineers:
I really want to know the punchline...
Shame on censorship. The punchline, as it was supposed to be was boobs moving in a certain way. It's just not the same unless you see it.
Damn that image awaiting approval thing totally killed my joke.