A brief explanation

  Let's see if I can put loving coitus into the simplest terms.

The simplest and most obvious observation is that it shouldn't be so difficult.  It isn't.  It is only complicated to understand.   That and the inability to admit there was a problem has held us in thrall to the animal for millennia.

There is only one reason the act of love is not.  Pressure on the glands in the crotch of the male makes certain it is all over soonest.  The pressure is applied by the muscles in the crotch and certain positions of the musculoskeletal structure.  

       It is all about mastering muscles. That is something a human can do and an animal cannot.  That's it.  It is simpler muscle control than talking and less coordination than riding a bike.  The muscles can be easily trained not to respond, except on command. Once men get the hang of it, it's as easy as walking on two legs.

Got it?

There is far more in Explanations, near the end of the posts.