There's a time and place for 'most anything, but when I hear people using words in the wrong context I think a little less of them.
For example, if someone is speaking correct English on television, the radio, or in polite society and suddenly pauses and resorts to crudities such as "pee" or "butt", it's obvious that he (or she) doesn't know the words "urinate" or "buttocks", "anus", "rectum", etc., or is somehow uncomfortable using them.
Several years ago, I was hospitalized for a problem, it included difficulty with my fluid output, I was going wayyyyyy too much and too often. It annoyed me no end to have the urologist come visit every morning and attempt to discuss the problem, he was always saying things such as, "We need to find out why you are peeing so much," rather than a more mature, medically-appropriate, "We need to find out why you are urinating so much," as though I, a 28-year-old adult, wouldn't know what that *long word* meant.