Erotic art is a broad field of the visual arts that includes any artistic work intended to evoke arousal. It usually depicts human nudity or sexual activity, and has included works in various visual mediums, including drawings, engravings, films, paintings, photographs, and sculptures. Some of the earliest known works of art include erotic themes, which have recurred with varying prominence in different societies throughout history. However, it has also been widely considered taboo, with either social norms or laws restricting its creation, distribution, and possession. This is particularly the case when it is deemed pornographic, immoral, or obscene.