Unruley behavior

  So it was a Sunday afternoon and I was outside enjoying a smoke with the downstairs neighbor.  All at once the other neighbor came outside and began small talk, How's the weather, sure is windy, that kind of stuff, then as abruptly as he came out he began talking about how he had a stent inserted in his back and then removing it from his penis.  I immediately began laughing, and it is not that it is funny at all, in fact it is horrible.  I am unsure of why I do this it may  be a masking technique i have developed to not show that I am really cringing inside.  As he continued on with the story his details and comments and everything about it was horrible.  But this guy came out of left field with a crazy story like this and I was totally unprepared for kind of conversation of that nature.  Here at this apartment complex we obviously have an open relationship with one another, however I did not feel that I knew him well enough to where he would divulge such personal information.  He had just recently been betrayed by his only friend in the state that moved here with him from Wisconsin.  His girl went nuts and moved out and he was forced to go through this procedure by himself.  I can sympathize with his conditions and find it amazing that he did this by himself (I am sure I may have needed mama, metaphorically).  My interaction with him was not to say a healthy conversation because I couldn't keep myself composed.  I have had a problem with this all my life as I stated in my intro.  I am unsure of his reaction to my reaction because my eyes were filled with tears blinding me from his facial expressive reactions to my reaction.  I am sure it wasn't a receptive look and for that I am sorry, nobody likes to be laughed at, but that is not what I was doing.  Amongst my laughter I was able to find a not quite so funny spot in the story to apologize for laughing and express my condolences for having to go through such a procedure that I would probably never be man enough to do.  Weather I am or not I do not know, but this was a compensation for my appalling behavior that was totally necessary.   In our first few chapters I have not encountered any kind of behavior or theory that correlates with this type of defense.  Another possibility is that it is just a part of my personality.  I have always been the type that is easy to make laugh.  My funny bone is very ticklish and always has been since I was a child.   Hopefully this class can shed some light onto understanding different defense mechanisms that may aid in better communication within my social world.