Sex crimes are forms of human sexual behavior that are crimes. Someone who commits one is said to be a sex offender.
Some sex crimes are crimes of violence that involve sex. Others are violations of social taboos, such as indecent exposure or exhibitionism.
There is much variation among cultures as to what is considered a crime or not, and in what ways or to what extent crimes are punished.
Acts regarded as crimes almost universally include the following non-consensual sex crimes:
Liberal western cultures are far more tolerant of acts such as oral sex or transvestism that have traditionally been held to be crimes in some other cultures, but combine this with lesser tolerance for the remaining crimes.
Cultures with highly censorious sex laws regarding adult sex acts often have high levels of concealed sexual abuse, particularly of children.
Some activists perceive circumcision, a practice common in the U.S., as a crime against children in violation of human rights laws. However, circumcision advocates perceive it as a religious rite, or a helpful or essential health measure, and believe it does not violate any child abuse laws. Courts in the United States have tended to favor the circumcision advocates in the majority of cases.
Many consensual sexual actions or activities are only viewed as crimes in some jurisdictions, including:
Examples of laws in various localities: