DeEvolution?

Every sixth month something "good" happens, and it happens when you least expect it, when you've come to the insight that everything is down the drain, crap de coloure. It's like God (or whatever the hell you believe or not believe in, or life in general, etc) taunts you. You reach a breaking point somehow...down and out for the count...and just so that you won't commit suicide to avoid more taunting, bitchslapping from life, it gives you a little taste of the good life.
Well this graph (x-axis = time, Y-axis = amount of happiness %) can be applied to anything in life, like the last time you got laid, or the last time you played a really great game, got presents, or vacation, etc, etc. Time in between is just time to kill and angst, "work, work". Well, as "Work, Work"-season begins after a sixth-month's end. Happy Go Lucky, I can only hope this theory is trustworthy enough cause then IGDI's got a good chance to succeed. You don't know what IGDI is? Well, perhaps in six months you will.

and by the way....
According to Star Trek, Cats evolved from the Leguanas -now that's something to think about!