Married but dating websites
For example, he may refuse to divulge his last name and for many people this is often a dead giveaway that the guy is married.
While it is normal for people to hold back initially, if the guy has something to hide, he will usually not reveal details about where he lives, what he does for a living, his family, his upbringing etc.
It's not that women don't do it; it's just that the men do it much more.
According to a MSNBC survey, 30% of the men using an online dating service are married. Well…there really is no fool proof method and sadly catching a liar online can be harder than catching the married guy hitting on you at the bar.
A married man is usually very cagey and does not like to reveal too many details about himself online.
In fact, as a general rule, it is best to be suspicious of profiles without photos.
If you start interacting with someone who doesn't have a photo online, request them to add a photo and let them know you prefer not to communicate with them unless they put up a photo.
If they are online at odd hours, you should ask them why.
However, there are some signs that might help you spot a married man online. A married man will not put up his photo online obviously because he does not want to be recognized.
Of course they can always put up fake photos but they usually do not have a photo at all.