An anal plug is designed to be inserted into the rectum for sexual pleasure. It typically resembles a fake penis and must have a larger base to prevent it from getting lost inside the rectum. Anal plugs come in a variety of colors, shapes, sizes, and textures. Some are designed to resemble a penis, while others have a spiral or wavy shape. However, most anal plugs have a tapered tip, a wider middle section with a waist to maintain proper placement after insertion, and a base to prevent complete insertion into the rectum.