I will never forget the first morning after Blanco discovered sex.  When the three of us woke up that day, he let out a high pitched sound that could only be described as a scream for joy.  I had never heard him make a sound like that.  He couldn't wait for me to let them out the door so they could start having sex again.  No breakfast thank you very much.  Sex was the only thing on his mind today.
 
Shekhina only went into heat every four or five months and then she was only receptive to sex for about ten days so it is understandable that Blanco and she would want to have as much sex as possible during that short window of opportunity.  Over the course of a year, Blanco and Shekhina learned how to have sex through trial and error just like the rest of us do.  And their relationship changed.  Before sex, they cared about each other but not in the same way they cared about each other once sex became a part of their relationship.  After sex, being separated from each other for even a few minutes became cause for concern.  And whenever they were reunited, they always exchanged passionate kisses on the mouth.
 
When Shekhina was in heat, Blanco would not allow any humans but me to pet her.  He guarded his lover with every fiber of his being.  There was an amorous neighbor dog who had a thing for Shekhina.  The first time she went into heat, he came calling.  His courtship was terribly sweet.  Every morning when we awoke, he would be standing patiently and quietly in front of our gate.  He never barked or whined.  He just stood there with a lovesick look on his face.  Once when we took our daily walk, he tracked us from a respectful distance.  We turned to see him trailing us at a 75 feet distance.  Shekhina was impressed and let out an affectionate whine as she started in his direction.  I restrained her because I was in no mood for puppies.  Blanco lunged toward the would-be suitor.  Our Romeo trotted away peaceably despite Shekhina's pleading to the contrary.
 
But the next morning he was waiting on the other side of the fence again.  Blanco was not impressed and barked vociferously until the other male dog retreated.  Shortly thereafter, Shekhina fell out of heat and the matter seemed moot.  But Blanco was simply biding his time.  
 
One day as we were coming home from our daily walk, the neighbor dog happened to be on the same road minding his own business.  The poor guy wasn't doing a thing and Shekhina wasn't even in heat.  But Blanco saw his opportunity and took off running.  He kicked the poor dog's ass all the way to his own front door step. Blanco had not forgotten the way he flirted with Shekhina the last time she was in heat.  I was caught off guard because I had no idea Blanco would remember his past grievance from several months ago.  And I certainly did not expect him to take such swift and final action about it.  The other dog wasn't hurt thankfully.  But he never dared to visit Shekhina again.