Once wrote a series of short stories about fantasy creatures living and working in a warehouse. My favorite were the weekending ghosts, who haunted a manor through the week, but took weekend trips to haunt the warehouse on Saturdays and Sundays to get a break from it all.
The bats incisor teeth are hollow, allowing them to suck blood in through the teeth like a straw, the saliva has several ingredients that prolong bleeding.
My favorite thing about this is: where does the blood go once it hits the top of the tooth? Into the gums? Into the sinuses? Out the back of the tooth and into the mouth, removing the need of a straw in the first place?
If it does go out the back of the tooth i wouldnt say that removes the need for a straw. Its like a siphon tube into a gas tank, but the tooth goes directly into the vein/artery and acts as a conduit for the blood so it doesnt spill everywhere or require a perfect suction seal with the lips.
I think there's been a shift in media here over the years. Older vampires, the formalwear "I vant to suck your blaaaad" types, often have very long teeth and leave only a couple of punctures after biting someone. It's pretty reasonable to assume these are actually drawing the blood through their teeth like little syringes.
Then as time goes on, vampires have gotten grittier and gorier. We've gone from beautiful damsels with tiny pinpricks on their necks, to staight up cannibalism. Vampires now just fuckin eat people sometimes. Somewhere in between, we did get a phase of vampires biting open the neck with a big gush of blood, and the now classic image of a vampire with blood all over their lower face. At this point it's clear they're just drinking it normally.
The Swedish radio show "Christer" called up the ambassador of Romania somewhere around 2014 (IIRC) to pop the question, and he confirmed the teeth were like straws.
In the Billy and Mandy documents a elderly Blackula is incensed when he is accused of sucking blood, he elaborately explains that vampire bats, as well vampires don't suck blood, they scrape and lick.
When I was in middle school and first learned about gay men I thought one penis would have to open up somehow to accept the other penis as what I now know would be called sounding. Also knowing what I know now that would be pretty extreme even for sounding but I was a preteen fundie and had gotten all my sex ed from an anatomy and physiology book in the family library with 0 direction from any adult so in the absence of any better ideas that seemed like the most likely way that would work out. Anyway this is a great example of why puritans wind up so kinky; you have no idea what normal sex looks like so you just have to imagine it and sometimes the imagination comes up with some really weird shit and before you know it you're having preteen wet dreams about stuff the human body doesn't even do.
The opposite of that is kinda how I thought tattoo machines worked as a kid- as in with hollow needles and an ink cartridge, like fountain pens, and each poke into the skin would deposit ink that way. I even 'figured out' that the tiny vacuum from pulling the needle out would be what pulled the ink down into the skin.
When I found out how tattoo machines actually worked, it seemed so messy (and loud!).
Tattoo needles are more like the nib of a fountain pen than a syringe; the ink isn’t shot down through the needle, but suspended at the end of it when an artist dips the tool into a well. Then, when the tip of the needle pierces a hole in the recipient’s skin (both the epidermis and the dermis beneath it), capillary action—the same force that makes liquid creep up the sides of a straw—draws the ink down into the dermis.
IKR? But yeah, nah, tattoo machines are basically a motor that pumps the needle up and down, and you have to dip it in ink to transfer it into the skin.
Well, venomous snakes do have hollow teeth, but they work in reverse. This makes sense since there are venom glands, but sucking blood upwards would make it go....where? Funny to think about.