Well you get a bunch of hot 22 year old chicks and...
Nahh let's not go there.
Correct paddling technique doesn't come naturally to most people (perhaps about as many as have a naturally correct freestyle swim stroke eh surfin39!).
Most surfers paddle with a fairly stiff elbow, rotating most of the movement through the shoulder joint and relying on sheer grunt to get the job done. They swing their arms wide on the return and put a lot of effort into the middle of the stroke. Often they cup their hands. They tire fairly quickly, within 50 strokes or so, and have to take little rests all the way out to the lineup. Sound familiar?
You think this is OK, fine, but I've got a thousand surfers with rotator cuff injuries I can introduce you to who'll tell ya otherwise.
Correct technique takes the effort out of the arms and shoulders and transfers much of it into the larger muscles of the upper and middle back.
I'm not gonna do a tutorial here -- if you want one of them you're gonna have to pay for it. But here's some tips:
The "catch" -- the initial sliding your hand into the water and the first six to 12 inches of movement -- is the most important part of the paddle stroke.
Put your hand in soft and flat -- fingers slightly apart, wrist tilted at 45 degrees, neither the thumb or the little finger going in first, but nice and flat -- take a fraction of a second to gather some water under the palm of your hand, and pull through.
Keep the hand relaxed and the stroke pretty much straight from "catch" to release -- don't twist your hand under the board too much.
Once your's hand's past the line of your shoulder, effective transfer of power is finished. At that point, cut the straining and relax. The back end of the stroke -- the "release" -- is all about bringing the hand out smoothly.
Bring it out earlier than you think -- about at the hip line, max.
Instead of lifting the hand out, lift the elbow. The hand will follow.
Keep the elbow high and track the hand up to the "catch" in as straight a line as you can.
Keep the strokes per minute down and focus instead on correcting the stroke. 40 spm done right will ruin 80 spm done wrong. (As the actress said to the bishop.)
And ... consciously ... relax.