As we working with defferent pleople tamly, some tymS we  are doing neccecary mistake or the things that coses trouble to different pleople, e.g when i,m calling someone with her  sily nickname instents of his original name. this is the things that makes other pleople feel unhappy, it is true that we needed to watch of what we are saying from other pleople.but the truth is every one in this world are making mistakes, so we need to learn from those mistake that we made dealy.