Sexual contact does not necessarily mean that you will get AIDS. If the other person is determined to be HIV positive, there is a probability of getting AIDS from sexual contact, and the probability is about 1 in 1000 people. If the other person is not sure if they are HIV positive, the probability of getting AIDS is significantly lower because the probability of the other person being HIV positive is not 100%. If the other person is sure that he or she does not carry HIV, it is impossible to get infected with AIDS if you have sexual contact with him or her. When sexual contact is made, the possibility of contracting AIDS exists because the mucous membrane of the genital tract comes in contact with the relevant body fluids, and as long as there is no wound, the probability of infection can be referred to above. However, when contact is made, there are some small wounds, the probability of contracting AIDS, will increase.