This guy in my exercise class left a note on my car door that told me to email him if I would like to have lunch sometime. Anytime a guy gives me his email instead of cell number I find it a little shady, like maybe they are already in a relationship and don't want their wife/ girlfriend to hear the phone ring or see text messages. In this case after I received the note I found out from another classmate that this guy is indeed married and of course I didn't email him. Does anyone else find that someone you know in real life giving you their email instead of cell number to be a red flag in general? Has anyone had experience with this? I also found the note odd since I have seen and spoken to this guy in class casually for four months and he seems very outgoing.