Yes, you read the name of this onahole correctly: the inside of the Romanesco Onahole is inspired by the titular broccoli, a fractal vegetable shape that give you mathematically calculated pleasure! Originating from a contest that asked people to submit onahole ideas, it is scientifically designed to give you the best masturbation experience of your life. As the cones are based on the Fibonacci sequence, they should allow the highest possible degree of stimulating surface. Now you can conduct your own experiment to test whether this hypothesis is true!
The Romanesco Onahole features: