The only time the guys would give email rather than phone number is the first step in online communication. In real life it's a sure sign the person is married or taken. Also it's important to watch for signs. I was once pursued by a guy who appeared to be very interested but acted odd, I didn't realize those were the signs he was in a relationship. I later found out he was in a long term relationship the entire time I just didn't pay attention to the signs ( never wanted to date me on the weekend only week nights never picked up the phone but replied by texts or call back later always called me while driving not from home etc etc ), luckily I didn't get involved but if things seem off they typically ARE off

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