Lies are better then the truth

In my opinion when someone asks you a question they always want to here something nice so why tell the truth if its going to hurt there feelings? like last year everyday before school my sister would ask me if what she was wearing looked alright ,so everyday of coarse I'm going to tell her she looks ok no matter what she was wearing because if i didn't it would hurt her feelings. so i believe you should always be nice whether its the truth or not.