Interesting.
I don't really know what to think about this. I understand the curiosity, but speaking for myself here, I would feel that it might be a little creepy from the outside looking in. I also think that a T should expect this kind of curiosity and behavior and should be able to handle it just fine. I think T's lives are separate from ours which is a good thing. Those that are close to us (like family for instance) wouldn't be any good to us because they cannot be objective. But--- things are not simply black and white.

Personally, I've read some things about my T, but that's as far as it will go for me. I have no further interest (I would actually be a little freaked out feeling if my T was too close). I don't even want to know where my T lives. However, I don't know if it really means anything is really defective with you simply because of this, so I wouldn't worry too much about whether or not it is "normal" or not.

I don't know if you HAVE to talk to your T about this, I think that is more of a judgment call on your part. If you feel better talking about it, then it's worth it.