Its possible to stick your tongue inside your nose from inside your mouth. I am among quite a few people that can do it and clean the inside of the nose from boogers.

How you ask? Here is the Wikipedia page about that, because if course there is one:

https://en.wikipedia.org/wiki/Khecar%C4%AB_mudr%C4%81

Human face pores are home to tiny, microscopic mites called Demodex.

They are most active at night, when they leave their follicles to mate on the face and then return to find a new follicle.

Almost everyone has them. So there are tiny arachnids having sex on your face every night.

Surprisingly not in this thread: all the horrible things pregnancy can do.

Humans can grow horns similarly to Omens in Elden Ring. Cutaneous horns can be caused by benign growths, precancerous lesions, or even skin cancer. Apparently, these are also becoming increasingly common in people.

If you feed a latex tube through the nose and out the mouth then pull it back and forth, it makes a squeaking sound

Retrograde menstruation.

Because the feliciano tubes aren’t closed on the ends, where they interact with the ovaries, blood from a period can flow backwards into your abdominal cavity.

Additionally, a small amount of sperm (if a woman is sexually active and say trying for a baby) can also go the full way and leak into the abdominal cavity.

So some women can have blood and semen free floating in their abdominal cavity. Between organs

Edit: autocorrect got me. I meant “fallopian tubes”

You can develop a rectourinal fistula and end up pissing shit

When fertile, women have significantly increased mucus volume in their vaginas.

https://en.wikipedia.org/wiki/Cervix

Several hundred glands in the endocervix produce 20–60 mg of cervical mucus a day, increasing to 600 mg around the time of ovulation.

There's a type of cyst called dermoid cyst which can grow hair, nails or even teeth inside it.

There are more cells in your body that aren't you, than are.

The count of bacterial cells in your gut, on your skin etc is higher than the number of your own cells.

Hej, I think its pretty cool how much slime we got producet in our bodies every day, like up to 1 liter! Me, personally, find it gross dat our noses produce that many bacteria, lol.

You have mites living in your eyelashes.

Our noses have erectile tissue.

https://en.wikipedia.org/wiki/Nasal_concha

Conchae are lined by pseudostratified columnar, ciliated respiratory epithelium with a thick, vascular, and erectile glandular tissue layer.

Of all of the cells in your body, less than 45% of them are human. The majority are microorganisms designed to work with your gross-ass self for similarly gross organic meat-bag processes.

Your bones are wet

Teeth, or rather where they meet your skull and jaw, are technically classified as a kind of joint!

Men too can produce milk.