did you know a horses penis can be 12-24inches? Some can be over 30. This would probably rupture a humans organs.
NSFW educational images
they have a muscle that retracts the penis into the body so it's honestly surprising to see just how big it really is


also when googling I found this image which is kinda funny to me because whoever saw it happening really spent the time drawing it manually and putting it into a book.

Also, horses have really massive hearts, which is pretty cool
