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Color-wise, behemoth phalluses are usually a similar color to their skin, only much darker, with black also being a common color. Each penis features a trio of medial rings in its midsection, each ring lined with supple yet pointy-looking nubs that lend them the appearance of spiked collars. These rings help to pleasure a partner’s erotic zones and inflate during orgasm to form a pseudo knot, which locks into the females’ ribbed tunnels.