Question

What is sexual contact? Why does AIDS occur?

Answer 1

Sexual reproduction is the primary method of reproduction in vertebrates including human beings. It involves the transfer of male gametes or sperms into the female body, where the process of fertilization takes place with the ovum or female gamete. The process of gamete transfer is carried out by sexual contact. Diseases that occur by sexual contact are known as Sexually Transmitted Diseases or STD(s).

Complete answer:
Vertebrates generally reproduce by sexual reproduction. In this type of reproduction, the male and the female gametes fuse to give rise to a zygote, which develops into an offspring. The higher vertebrates, the fertilization is internal and takes place in the females. The male gametes are released into the female body with the help of sexual organs which fertilize the female gamete resulting in zygote formation.
This transfer of male gametes into the female body takes place through sexual contact and is known as sexual intercourse and is carried out by individuals of opposite sex. However, in human beings it can be undertaken for pleasure as well.
Acquired Immunodeficiency Syndrome or AIDS is a viral infection caused by Human Immunodeficiency Virus or HIV. The virus affects the components of the human immune system. Clinical symptoms include influenza like symptoms followed by a prolonged period without any symptoms. Ultimately the immune system is greatly weakened leading to immune related diseases.
The primary mode of transmission of the virus is through sexual or vertical contact and also through exposure to body fluids of an infected individual.
Sexual contact with an infected person without protection can cause AIDS. Vertical contact is when the disease is passed on from the mother to a child during pregnancy, delivery or through breast feeding. Exposure to body fluids of an infected individual can occur during contaminated blood transfusion, sharing needles during transfusion or intravenous procedures.

Note: The purpose of sexual contact is reproduction in most vertebrates. It takes place when males transfer gametes to females. However, in human beings, sexual contact can be carried out for pleasure as well. AIDS is classified as a sexually transmitted disease caused due to HIV infection. The transmission modes are through sexual contact, vertical contact or exposure to the body fluids of an infected individual.