Perhaps it's not charisma then, I just know that some people have a certain energy about them that people are attracted too, but it could be a number of things, it could be your voice, guys may be really attracted to it, or your looks, or both, or the way you conduct yourself in the lab. We never know how people view us, and what they are thinking. Everyone is attracted to different details about a person. Others like the quiet type who aren't full of themselves, because they think that people like that can give them a challenge. Some people really like being challenged. Others don't of course, but some do.