Is sex bad?
Sex is not bad. It is necessary for carrying on the species, in other words, without sex, the human race would die out.
Various groups and organizations have made rules and laws to deal with sex.
* Religions generally regard sex as only appropriate for married people. They have various rules about masturbation and same-sex. These rules apply to people who follow that particular religion.
* States make laws about minimum ages for sex, and when a young person can legally consent. This is called Age of Consent. Some states and countries have extra laws allowing or forbidding same-sex. * Consenting Adults is a term which is often used about sex. It claims that people over the age of consent, and who have both agreed, can have sex any way they like, in private. See the related question below about "Age of Consent".