It might sound crazy to say that swearing ought to be part of who we are today, given the fact that it is part of our human emotions. Meanwhile, according to Dr. Rebecca Roache, author of a new book, "For F*ck's Sake: Why Swearing is Shocking, Rude, and Fun," swearing is not something that we should ignore. As healthy and mature adults, swearing is totally acceptable, as long as we do it right. Is that so? How should we make swearing more fun and engaging? Dr. Roache explains more.