The following paragraph

vox:Most of the early explanations of nail biting have been thoroughly disregarded. Sigmund Freud, for instance, believed that excessive nursing during infancy could lead to a so-called "oral receptive" personality — and a tendency to chew on nails and other objects, as well as a distinct preference for oral sex. He had no evidence for this idea, and subsequent followers of his ideas didn't turn up any, either.

seems to be copy/pasted from https://www.vox.com/2015/4/22/8464365/nail-biting

Try to write an original post. If you want to quote a paragraph that is fine but please mention your source.