When you are doing a second round review, do you read other reviewers' comments? Why? When you are doing a second round review, do you read other reviewers' comments? Why?
It seems to me that all I need to do is seeing whether the author/s satisfied my comments and whether I find any more problems in the current version of their manuscript.
I do read the other reports, and other reviewers should too.  A few reasons:


If the editor has an author's response letter and two reviews, and the three documents say different things, then the editor will be very confused.  If I see the other reviewer and the author disagree, then I try to be a tie-breaker to help the editor.
Authors are not in a place where they can convincingly say the other reviewer is wrong.  If I see that the other reviewer has made a mistake, I can point it out much more effectively than the authors because I am a neutral party.  Ideally, editors would be able to do this, but they have limited time.
By reading other reviewers' comments, I can learn to be a better reviewer.