All sexual relations outside the confines of monogamous, heterosexual marriage are regarded as immoral. Marriage is to be heterosexual and monogamous. All sexual relations outside of heterosexual marriage are criminalized. HIV transmission occurs largely through heterosexual intercourse. Male circumcision provides only indirect HIV protection for heterosexual women. This applies to both heterosexual and same sex couples. The couples include both heterosexual and same-sex couples. Similar advertisements with heterosexual couples kissing were not pulled. The stories they contain being equally applicable to gay and heterosexual relationships. Gendered roles in heterosexual marriages are learned through imitation. Burts had worked in both heterosexual and gay pornography. Nevertheless, Cohen expresses concerns surrounding the dichotomy between queer and heterosexual. Other studies have shown a preference for men dressed in red among heterosexual women. However, this is only within the limits of heterosexual marriage. There is also a risk of an unplanned pregnancy in heterosexual relationships.