You are hungry. And you know there is a very good delicious sandwich in the fridge.
1. You either - open the fridge and get the sandwich.
2. OR - open the fridge with your mouth, while standing on a chair that only has 1 leg and balancing a watermelon on your head at the same time. Now THIS sandwich might have an extra slice of cheese and may be 2 more slices of turkey on it, but it's practically the same thing.
And in case you pick number 2 - will you actually feel like you achieved something and not feel cheated and like you wasted a lot of time on nothing?
PS.: see what i'm pointing at?