From WIKI

Zoosexual acts are illegal in many jurisdictions, while others generally outlaw the mistreatment of animals without specifically mentioning sexuality. Because it is unresolved under the law whether sexual relations with an animal are inherently "abusive" or "mistreatment", this leaves the status of zoosexual activity unclear in some jurisdictions.

Laws on zoosexuality in modern times are often triggered by specific incidents or by peer pressure.[11] Whilst some laws are very specific, others employ vague terms such as "sodomy" or "bestiality" which lack legal precision and leave it unclear which exact acts are covered. Other factors affecting the operation of law include enforced assumptions as to abuse, creative use of alternative laws, and the impact of uncodified cultural norms, prohibitions, and social taboos. In the past, bestiality laws were mainly put in place for religious reasons and the assumed possibility that sex with an animal could result in monstrous offspring, and were primarily concerned with the offense to community standards.[12]

Currently, the legality of bestiality varies greatly around the world. It is legal in some countries, such as Sweden, Denmark and the Netherlands, while it is illegal in Great Britain (for penetrative acts), Canada, and much of the United States, Australia and New Zealand. Countries such as Belgium, Germany and Russia are in between the two as they permit sexual activity with animals but strictly prohibit the promotion of animal-oriented pornography.[13]

Notable legal views include Sweden, where a 2005 report by the Swedish Animal Welfare Agency for the Swedish government expressed strong concerns over the increase in reports of horse-ripping incidents, and gave as its opinion that current animal cruelty legislation needed updating as it was not sufficiently protecting animals from abuse, but concluded that on balance it was not appropriate to call for a ban. [20], New Zealand where the 1989 Crimes Bill considered abolition of bestiality as a criminal offense, and for it to be treated as a mental health issue.[14] In some countries laws existed against single males living with female animals. For example, an old Peruvian law prohibited single males from having a female alpaca.[15]

A more detailed list of countries and laws can be found at zoosexuality and the law.