Sexually transmitted diseases (STD), also referred to as sexually transmitted infections (STI) and venereal diseases (VD), are illnesses that have a significant probability of transmission between humans by means of sexual behavior, including vaginal intercourse, anal sex and oral sex. Some STIs can also be contracted by using IV drug needles after their use by an infected person, as well as through childbirth or breastfeeding.
Sexually transmitted infections have been well known for hundreds of years, and venereology is the branch of medicine that studies these diseases. While in the past, these illnesses have mostly been referred to as STDs or VD, in recent years the term sexually transmitted infections (STIs) has been preferred, as it has a broader range of meaning; a person may be infected, and may potentially infect others, without having a disease.
Human sexuality is the capacity to have erotic experiences and responses. A person's sexual orientation may influence their sexual interest and attraction for another person. Sexuality can have biological, emotional/physical or spiritual aspects. The biological aspect of sexuality refers to the reproductive mechanism as well as the basic biological drive that exists in all species, which is hormonally controlled. The emotional or physical aspect of sexuality refers to the bond that exists between individuals, and is expressed through profound feelings or physical manifestations of emotions of love, trust, and caring. There is also a spiritual aspect of sexuality of an individual or as a connection with others. Sexuality impacts and is impacted by cultural, political, legal, and philosophical aspects of life. It can refer to issues of morality, ethics, theology, spirituality, or religion. Some cultures have been described as sexually repressive.
Interest in sexual activity typically increases when an individual reaches puberty. Some researchers assume that sexual behavior is determined by genetics, and others assert that it is molded by the environment. This is the nature versus nurture debate, in which one can define nature as those behavioral traits that are due to innate characteristics, such as instincts and drives. The concept of nurture can be defined as the environmental factors or external stimuli that influence behavior, emotions, and thinking. Biological and physical differences include the human sexual response cycle among men and women.
Sexual health clinics specialize in the prevention and treatment of sexually transmitted infections.
Sexual health clinics provide only some reproductive health services. Few clinics perform abortions or offer birth control other than condoms.
Ass to mouth is a slang term primarily used to describe the withdrawal of a penis from the receptive partner's anus followed by the immediate insertion into the receptive partner's or another partner's mouth, though fingers or sex toys could also be covered by the term.]citation needed[
If the recipient of ass-to-mouth is performing fellatio on a penis or object that was removed from his/her own rectum, the health risks are generally limited to disturbances of the gastrointestinal tract, which may proceed from introducing normal intestinal flora from the rectum to the mouth and upper digestive tract. If the recipient's ano-rectal area is infected with a sexually transmitted disease like gonorrhea, however, there is an added risk of transmitting the infection to that person's mouth and/or throat. Intestinal parasites and other organisms can also be carried in feces. Risk of STI or parasitic transmission exists generally only if fecal particulate from an infected person is transmitted to the mouth of an uninfected person.]better source needed[