Anal Intercourse is a Dangerous Hobby

[Agnostico]

Cows most frequently. Semen is sold by breeders because cows need to get pregnant regularly to keep producing milk.

I watched a doco on the milk/veal industry. It made me seriously consider becoming a vegetarian.

The females aren't grazing in a lush green meadow. Instead they are crammed in a big barn with no room. 
They're genetically modified to hold more milk, in this constant cycle of pregnancy which wears them out. It all results in a short life span for her

Meanwhile the mother watches in despair as her calf is taken away every time. If it's female it gets farmed for milk.
If it's male it gets put in a tiny pen. They limit its movement so that its muscles remain tender before being slaughtered and sold as veal.

It's real cruelty to animals