Roommate and television

Why does my roommate do the following? 

We will be watching tv and he will be on the couch and i'll be in the recliner to his right.  About 6 feet separates us.  Something comical will happen on tv and he will look at me while laughing.  This happens about half the time a comical event occurs.  Last night while watching a movie, I recorded how many times he did it in a 20 minute span.  He looked at me 4 times. 

This kinda makes me uncomfortable and is very annoying especially when I'll be sitting on my laptop doing something school related.         

>>1
Do you perhaps have the condition called Assburgers?  Assburgers people have little or no clue about these social interaction things.