He’s quite right … and he drives home the point in a recent blog post:
Desmodus rotundis isn’t sexy. (Except insofar as small furry rodents that carry rabies aren’t as un-sexy as some other obligate haemophages.) Bed bugs are really not sexy. But if you want maximally not-sexy, it’s hard to top Placobdelloides jaegerskioeldi, the Hippo Arse Leech.
The Hippo Arse Leech is a leech; it sucks blood. Like most leeches, its mouth parts aren’t really up to drilling through the armour-tough skin of a hippopotamus, so it seeks out an exposed surface with a much more porous barrier separating it from the juicy red stuff: the lining of the hippo rectum. When arse leeches find somewhere to feed, in due course happy fun times ensue — for hermaphrodite values of happy fun times that involve traumatic insemination. Once pregnant, the leeches allow themselves to be expelled by the hippo (it’s noteworthy that hippopotami spin their tails when they defecate, to sling the crap as far away as possible — possibly because the leeches itch — we’re into self-propelled-hemorrhoids-with-teeth territory here), whereupon in the due fullness of time they find another hippo, force their way through it’s arse crack, and find somewhere to chow down. Oh, did I mention that this delightful critter nurtures its young? Yep, the mother feeds her brood until they’re mature enough to find a hippo of their own. (Guess what she feeds them with.)
Here ‘s a video by Mark Siddall, professor of invertebrate zoology at the American Natural History Museum, a noted expert on leeches, describing how he discovered P. Jaegerskioeldi, just in case you think I’m making this up.
By the end of my description Jim and Freda were both … well, I wish I’d thought to photograph their faces for posterity. So were the audience. And that’s when I got to the money shot: the thing about fictional vampires is, vampires are only sexy when they’re anthropomorphic.