A fucking machine is a machine designed to provide repetitive penetration that mimics penetrative sex. The speed, vibration, and intensity can be adjusted to a person's liking. It can be used for both anal and vaginal penetration. Attachments can be varied. That is, a dong-shaped attachment is often used for the vagina. A butt plug shaped attachment can be used for the anus. Other available attachments include male masturbators, double dongs, and Fleshlight holders.
