I have to agree with you on this topic, it is a serious issue and predominately male - however I fear whatever punishment is given will not reduce it significantly.
Essentially what you are talking about is a genetic desire, an essential part of every single species on this planet to continue existing through reproduction. If a species has no desire to reproduce it would quickly cease to exist - without reproduction in any sort of form all you have is an organism that exists, slowly degrades and dies. To continue it has to reproduce, and that desire is something that is just part of genetic make up - you are not born to learn to reproduce - just like a bird, dog, cat, sheep, cow are not taught how to reproduce - they just know genetics carry far more instructions then just physical development of an organism.
I would like to point out I am not excusing the behaviour you describe - it's abhorrent and does need stamping out - but from a Biologist's point of view the only true way to do that is change male genetic code to repress the urge to reproduce. It becomes even more complicated because wide variations in human genetic make up make it difficult to pin point why some are able to control and channel their urge to reproduce while others just succumb to it.
That's rightly said it's kind of coded in the DNA and then the cultural influences, everything adds up. It is may be impossible to curb this out completly with so much of manipulation that is continuously happening to human genetic structures. But the saddest part is that this is the most gross thing happening and the impacted ones are at majority women