Why do I do this to myself?

Well, all week I knew that today was going to be painful. Each time I logged onto www.trainingpeaks.com (the place where I log my workouts) I would see the intimidating 12 mile lsd (long slow distance in non-runners terms). Even when I woke up this morning, I dreaded it; not that I don't enjoy running because I do but I know how painful it is going to feel afterwards.
So this morning I got up and went to the temple as part of our Stake Temple trip. Don't worry I wasn't focused on the run during my time in the temple. The temple was great by the way! We got back around 6PM and I was about to use the temple trip as an excuse of why I wasn't going to be able to fit the run in but knew that it wasn't the case, we still had another 4 hours of daylight. After an epic battle of whether to run or not, I finally put on some running shorts and stepped out the door. I programmed my watch for a 12 mile run so I wouldn't wimp out in the middle of the run and then began to put one foot in front of the other (multiple times after all 12 miles is very long). After the great run with beautiful weather, I returned to 20 Cranesbill Dr (where I live). Went up stairs. Laid on the ground asking myself, "Why did I do that?"