(It should be spelt bestiality)
One of the great sexual taboo (no, not getting it on with your long lost sibling), is getting it on with the family pet / pastoral sheep / etc. Apparently, now there is a better reason to stay away from the furry lures of the animal of your choice: sex with animals increases your chances to be infected with STDs as well as develop penile cancer.
You have been warned.
Moar tak senonoh stuff under the cut.