For many, the only concern before having sex is the risk of pregnancy. Others believe that only one time is no risk at all. Unfortunately, both premises are wrong. Unsafe sex carries a multitude of risks. These are just a few.
If you have sex with a carrier of an STD you are at risk. Sometimes even if you wear a condom. Anytime anyone has unprotected sex you increase your risk of contracting an STD-"One in particular that might kill you"!
The most important factor is familiarity with your partner, with whom you should have a steady social and monogamous sexual relationship. Risk of getting infection is greatly increased by having sex with a casual acquaintance, whether a sex worker, a businessman, or any occupational grouping.
If he or she had sex on a casual basis with you, he or she has probably done so with others, some of whom may have had an STD.
If you cannot resist the thrill of having sex with each new acquaintance, you can take many measures to minimise infection even if some of your partners are infected. Examining your sex partner may be feasible (particularly if you are a woman) and frequently reveals evidence of infection. Use of a condom greatly reduces the risk of passing on infection to either partner and also protects the female from pregnancy. Urination immediately after coitus and thorough washing of the genitals with soap and water are probably of very limited value but are better than nothing.
After unprotected sex with a casual partner, seek medical examination before further sexual activity. Symptoms show an immediate need for such medical care, but it is important to remember that infection in both men and women may not show symptoms. Freedom from symptoms is an unreliable guide to freedom from infection.
Sexually Transmitted Diseases and diagnosis