so much for anonymity

I got my first comment today. From someone named Andy. (Hello, Andy. You seem nice.) Anyway, I'm not really sure how he found me. Well, I guess I think I know how -- blogger profile, maybe? -- but mine is underdeveloped and rather dull, sooooo. . . what up? Can people search for other people on blogger by age, gender, favorite indigenous people, etc.? That would make some sense, but I can't quite figure out how and don't in the moment feel like investing the energy. This whole blog thing is new and frankly, I can't even find myself via garden-variety searches, so how a complete stranger manages to stumble across me, I don't know. But then again, complete strangers find me (and I them) everyday.