The pit bull is to white trash people as the chocolate lab is to white people. In fact, pit bulls can be viewed as the official mascot of the White Trash Nation.
The adoption of one's first pit bull puppy is a rite of passage for the young white trash man or woman. For the white trash woman, it means she has established a home of her own; however, in the case of the white trash man, it means he has taken up with - perhaps even become engaged to* - a woman who likes him well enough that she will allow him to move himself and his pit bull puppy into her home.
*See Item #1