Diana and others have said that it is really because I tend to burst out with something wise. I don't know if that has always been the case, but I do see that pattern now.
I do not like socializing with new people one on one. It is my least favorite method. I really don't know what to say next, and find myself becoming more and more uncomfortable, feeling put on the spot. Many others I know who are introverts do not feel this way and feel safer during one-on-one interactions. I feel it is something that really sets me apart. I am sure there are others who prefer initial group interactions, but I have not met them.
Right now, I am going through a period of missing intimacy. I am also realizing that some of what feels like intimacy may just be a trick of my mind. True intimacy is difficult. It requires both sharing and accepting. It requires requesting things you need while not controlling or demanding. It requires being open to new ideas while staying true to oneself.