Butt plugs are designed in such a way to ensure that anal play is both safe and pleasureable. No matter what the plug’s shape or size is, you’ll find that each and every anal plug has a base, neck, and body. A plug’s base is flared so that it doesn’t get completely sucked inside. The last thing anyone wants is an unexpected trip to the emergency room to have a plug removed! Just past the plug’s base is the neck and is designed to help keep the plug in place.