There is a right way to do things and a wrong way. Just like sex – you know you did it right when someone bleeds. Sure, you can be all timid and straight-up missionary, but there is nothing like a 45-minute, multiple-position, bottoming-out, mix-up-the-pace session before it turns a little rough time when after done both collapse from exhaustion and there is a little bit of blood. That is something to be proud of.
While the previous paragraph is not a job, In many of my jobs around the house, I score the difficulty by how many times I bleed. Changing the exhaust usually is not difficult per say, but it is tends to be a two or three cut job. Putting tin on the roof of a building usually results in a couple of cuts and many bruises (sub dermal bleeding counts too).
In all instances, the bruises, cuts, and other types of bleeding is a proud badge of honor knowing a job was done right and the effort provided was nothing short of extraordinary.