Jinders, I'm pretty sure you can chalk it up to wishful thinking. It is the job of dramatic artists to make you believe something is happening when it really is not. In this case -- as in MANY OTHER cases -- they simply made viewers believe in the spankings so strongly, the viewers remembered it as fact.
It really is our fault, you know. If we -- and by "we" I mean the vast viewing public as a whole -- did not continually let these creative people "off the hook" by swallowing their deception hook, line, and sinker, they would stop doing it and get down to the business of delivering what they promise.
Methinks we, the spanking public, have got to make ourselves heard loud and clear. One way to do it is to strongly support spanking websites, publications, and videos. If Hollywood sees there is money to be made in honest spanking scenes, there will be no power on earth strong enough to keep them from climbing aboard the bandwagon. But we have to make them believe it first.