Yes, I do this. If I am just casually hanging out with friends I don't use it unless a subject comes up where I feel strongly about explaining myself accurately. I notice at work when dealing with the public, if I change my tone of voice to a very soft, higher pitched, semi melodic tone, I will get the desired reaction I want out of the person. The more gentle yet not wishy washy I sound the better. I actually get great results and can accomplish goals better than a lot of other people. Also, if I don't do this, I might get frustrated or angry and the convo will go down the drain because they will get defensive and sometimes even aggressive. I like to call it finesse.