Sometimes when I'm playing a variation that I'm comfortable with I get bored while waiting for my opponent to move, so I get distracted and start to pay attention to other things around me.
I know that focus is important, and being distracted can put me on short pants when playing, but lets, for the purpose of this question, ignore that.
As an example, yesterday I was playing with my uncle with no time limit, and the Real Madrid game was on. While waiting his moves I took a (sometimes not so) quick look at the TV.
Obviously, my uncle is someone I respect. When doing this I had (and always have) no intention of looking presumptuous or insinuate the game is easy (and I don't think my uncle got me wrong).
But not everyone I play against knows me as well as my uncle. Does this look bad when playing? Can my opponent be offended?