There is no question in my mind as to which is the most clever:
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flexible time-managment


As for the funny ones, I'd have to say that this one was good. When my wife saw it she said, "That's funny."
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Impotence: it can happen to anyone.


However, when she saw this next one she laughed so hard that she could not stop.

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"Government warning: Don't buy a fake Rolex."

HandEFood, you win.


The question is not, Can they reason? nor, Can they talk? but, Can they suffer?
~Jeremy Bentham