vestigial makes the world go round

vestigial limbs:
Beware the whale walkers!
These large creatures seem docile and harmless during the day, but by night they creep onto dry land and abduct people and creatures to take them to their watery grave from which they shall never return. How can they do this you ask? Well they have vestigial legs left over from when they once walked on land all the time. With these, in conjunction with their fins, they move themselves across the earth and drag their unsuspecting prey off to the depths of the sea. So don't go out at night if you live near a seacoast, because you never know when the whale walkers will get you.
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vestigial sex:
Diego Rivera's sexual endeavors were also vestigial and meaningless. He was a player of his time, very incompetent but not impotent, blindingly clearly not even, because he had sex with many people with reckless abandon. But he did have a tendency to think he was slightly omnipotent and that his paintings were better than many others and regardless of the fact that his stuff looked nothing like it, he insisted his work was rooted in Mayan and Aztec art. Lies.
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Mixing the two:
Tyrannosaurus Rex's had vestigial arms which couldn't reach out to do anything. Which makes me think, how could they have sex without their arms to balance? This also brought an interesting image into my head - tyrannosaurus sex - a new position where you keep your arms curled up and don't use them, but that could always be misconstrued as S/M depending on how it's done, maybe with the arms bound in some way to make them curled up as such. But who cares really if it is considered naughty, when the world runs on sex and despite what people say, they always have it on their minds.