Dildos are designed to go inside a vagina, anus, or mouth. Dildos come in many shapes and sizes, but they're often shaped like a penis. Some look like realistic penises, and others are more abstract.
For the more adventurous pleasure seeker there are ribbed, shaped and curved to help stimulate your g-spot or prostate.
Some even have a vibrating, moving or thrusting function which means they can be used to stimulate the clitoris or outer parts of the labia.