Nicknames bring people closer together. They’re endearing and create a sort of intimacy that other people don’t share. This Reddit user fell into the habit of calling people “Big D” whose first letter in their name was D.
When a large woman named Donna entered the workspace, he began calling her “Big D” without thinking of the repercussions. This is one of those good ideas that go right over our heads if we’re not thinking too much into it. Donna grew to dislike this Reddit user and we can see why (via Reddit).