Facetiously

If you think too about it too much, life can give you a headache.  There's simply too much.  Too  much wrong.  Too much bad.  Too much of everything. 

Dogs see the world in a much simpler way.  Life is a romp, a walk, a good sniff, dotted with naps and food.  Life is simply not to be taken seriously.   It's amusing, fun, frivolous!  So let's all put on our dog-colored glasses and see the world a bit more facetiously.    That's why dogs don't get headaches.