STD’s are defined as any infectious disease that spreads from one person to another during sexual contact or it is defined as any disease that is transmitted by sexual contact caused by micro-organisms that survive on the skin or mucus membranes of the genital area or they are transmitted by semen, vaginal secretions or blood during intercourse. STD’s include AIDS, Chlamydia, genital herpes, genital warts, gonorrhea, syphilis, hepatitis, etc. AIDS (Acquired Human deficiency syndrome) caused by HIV virus damages immunity system of human body.