Anal Intercourse is a Dangerous Hobby

[Gawdzilla Sama]

Zoo vets routinely ultrasound an elephant's womb via the rectum. They typically go in up the shoulder, but often have to "clean the way" first. No shit.

I believe ya. I've seen farm vets shove their whole arm into the rectum of a cow or horse for reasons unknown to me.

Safe sex but the vet uses a gigantic condom on his arm still.

Rectum or vagina. When they inseminate an animal they move the semen as far up the pipes as they can for best results. Rectums are tricker as the guts get twisty pretty quick.