According to the author of Is He Cheating On You? 829 Telltale Signs most cheaters display signs of infidelity they aren't even aware of and wouldn't even think to cover up.

Most people either miss or misinterpret the many subtle signs of cheating that are staring them in the face. If you knew what to look for, you can find countless signs of infidelity using only your ears, your eyes, and your personal knowledge of your mate. It's not the obvious signs of infidelity, it's the subtle signs, the ones most people overlook that will give the cheater away every time added the author.

Here are some of these signs of infidelity that the author has identified:

Physical appearance. Look for changes in his wardrobe, personal hygiene and grooming. A man who is having an affair want to make himself more attractive.
Cell phones. Todays technology advances make it easier for a husband to cheat on his wife. But it's also easier for a husband to get caught while trying to make contact or stay in touch with his lover.
Conversational clues. He may mention new people, places and things, while the people, places and things he normally talks about are no longer a part of his conversation. Even his tone of voice can be an important telltale sign. What your husband refuses to talk about can alert you of his involvement on an extramarital affair.
Day-to-day behavior. We all have a routine that we usually follow each day. A man who is cheating will display changes of some kind on his normal patterns of behavior. Pay close attention to any deviations in your husband's daily routine. These deviations are telltale signs.
Sex. Be alert for any type of changes in the frequency or the quality of your sex life together. Most important of all is to take steps to protect yourself if you suspect your husband of having an affair. Do not put yourself at risk for HIV or AIDS or some other sexually transmitted disease.

Some sexually transmitted diseases

1) Gonorrhea is an infection caused by a coffee-bean-shaped bacteria. Untreated, it can result in infertility, arthritis, heart problems and pelvic inflammatory disease. Among the symptoms are women may have a greenish discharge, throat may feel dry, sore, or scratchy.

2) Hepatitis B is potentially lethal virus that causes the liver to become inflamed. Extremely, contagious, it can be spread by any contact with an infected person's blood or body fluids, from sharing a cup to kissing to intercourse. Symptoms: extreme fatigue, headache, fever, vomiting, dark urine, clay-colored stool and yellowish skins and eyes.

3) Human Immune-deficiency Virus (HIV), a deadly infection that gradually causes the immune system to deteriorate. It is spread through blood, semen, vaginal fluids and breast milk. HIV can progress to the fatal disease AIDS. Infected people may have no symptoms for years- to know, you need a blood test for early detection and new drug treatments may prolong life.

Resource: Woman Today

Women's Journal