Last Monday was my wife Joanne's birthday and I noticed a number of nice birthday greetings on her rarely visited Facebook page.  

Being the ever nice spouse, I alerted her to it and directed her to them. Of course, she was pleased and I encouraged her to "Like" each message.  When she questioned why, I explained that it was "social media intercourse" and by doing so she was reciprocating the intended good feeling of the message.  

She did so and it goes on and on.  After all, it is one of the secrets of addictive social media.  

Social Media Intercourse takes at least 2 people and, if done right, is a feel good experience :)