Why do people get pimples?

Humans tend to get acne and blemishes because of grease. Grease occurs because of the hormones in your body. As you may know, there is bacteria all over your body, some are good and some are bad. The bacteria on your face is some what good yet some what bad. The good thing is that the bacteria of your face eats the grease, making your complexion less shinny and greasy. The bad thing is, for people who produce a lot of grease, the bacteria gets full and has to "do its business" and the bacteria literally poops on your face, causing pimples. Therefore, answer to the question is because of growth hormones in a humans body, which cause grease, which cause pimples.