Can someone explain this phenomenon to me?

The "phenomenon" I am referring to is that of driving at a speed that is LESS than the speed limit. Now, I am not on a rant or anything of the sort...I truly am baffled and confused as to what motivates someone to drive LESS than the speed limit. When I get in my car (even with as much as I love my car), my goal is to get from Point A to Point B in the least amount of time as possible. I usually am pretty good about obeying traffic laws and speed limits, so I am not advocating driving over the speed limit. If the speed limit is 45 and you are in front of me going 45, we are all good. It's the people driving in front of me that are driving 34 in the 45 mph zone that I just don't get. Now this may be because they enjoy the time spent in their car, sunroof open, their favorite music blaring, breeze in their face. While the time spent in my car is listening to The Backyardigans and my children screaming (not singing) the words to the songs, smelling old french fries and possibly an ancient sippy cup with milk in it that we can't seem to find under one of the seats, referreeing the fights in the back seat over the cheap McDonald's Happy Meal toy, all the while trying to dodge getting hit with Goldfish or a shoe. So maybe I just answered my own question and it's possible I just figured out why it is that my goal is to get from one point to the next as quickly as possible and we don't share that common goal, so maybe what I'm trying to say is if you're one of the people that participate in the "phenomenon" I am speaking of it would be so kind of you to snap out of your happy, zen place for one short moment to get over to the right and let me go around you so that I can get to my destination in the shortest time possible. Trust me, this small act of kindness would be so greatly appreciated by the drivers that don't happen to be enjoying their car time as fully as you do.

...so maybe I ranted a little.....hey, isn't this what a blog is all about?