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

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”

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.

You can develop a rectourinal fistula and end up pissing shit

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

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

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

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.

Men too can produce milk.

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

Your gut biome is the only way you can digest leafy things. Without them most of it would just stay in there, or go right through you.

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.

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.

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.

Newborn baby girls can experience a phenomenon called "false menses" or "mini-periods" due to a sudden drop in maternal estrogen after birth, causing slight vaginal bleeding or a blood-tinged discharge that typically lasts only a few days.

A lot of poop is dead bacteria by volume.

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.