Listen to the song Reach by a band called Lo-Pro on youtube... That's me. The only persons I am goofy around are my brothers and they don't live anywhere near me. Being a person suffering from bipolar disorder and going through ridicule from my peers as an emotionally unbalanced and extremely shy child (when I forst started talking I would only talk to my dog until I was about 4) has made me a bit reluctant to risk feeling all that again. I don't feel safe around others much and always have had a need to be taken seriously so people don't have grounds to called by something that will trigger childhood trauma. All this happens on a very subconscious level. I don't go into social situations thinking "I need to be cool so people won't mock me." I just do it. Hope this gives a little insight to some of us introverts.