Marriageable age and Teen marriage Sexual conduct between adults and adolescents younger than the local age of consent is illegal, and in some Islamic countries any kind of sexual activity outside marriage is prohibited. In many jurisdictions, sexual intercourse between adolescents with a close age difference is not prohibited. Around the world, the average age-of-consent is 16,  but this varies from being age 12 in Angola , age 16 in Spain and Canada , and age in the United States. In some jurisdictions, the age-of-consent for homosexual acts may be different from that for heterosexual acts. The age-of-consent in a particular jurisdiction is typically the same as the age of majority or several years younger. The age at which one can legally marry is also sometimes different from the legal age-of-consent.