Is it permissible to watch animals copulating for the purpose of arousal when having sexual intercourse with one's wife?

There is no legal impediment to viewing animals that one desires, as the fundamental principle concerning things is permissibility unless there is evidence to the contrary. Nevertheless, a person should avoid these matters because they may compromise one's integrity and distract them with what is not beneficial. A condition for the permissibility of viewing is the absence of temptation; otherwise, it is forbidden, as such viewing is prohibited when accompanied by lust.