Disclaimer: the contents of this fic may make it difficult for readers to conjure up toe-curling fantasies about the Doctor in future. Read at your own risk.
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Martha loved the Doctor to bits.
He didn't feel the same way, but that didn't stop her from imagining what it might be like if he did. But before she could conjure up any toe-curling fantasies, her brain--ever the stickler for biological accuracy--hit a snag.
She had no idea how Time Lords reproduced.
Sure, he looks human, mused the little voice in her head, but you have no way of knowing how alien his reproductive system might be.
Shut up, Martha told the voice.
It might involve spores.
Shut. Up.
He might try to lay eggs in your eyes. Ever think of that? Dozens--maybe even hundreds--of little Time Lord eggs incubating in your brain.
I'm not listening.
It might not kill you. Perhaps, once the eggs hatched into tiny larval Time Lords, you could expel them through a series of sneezes. Harmless!
He's not, Martha thought furiously, an insect!
He's not, retorted the little voice, a human. So the way I see it, my unlikely fantasy is as good as yours.
Martha considered this. Then, stealthily, she tried to go back to conjuring toe-curling fantasies.
Spores! chirped the voice.
With a disgusted sigh, she gave up.
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FIN