What's up with couples who have blog conversations?

It's so annoying/weird to read someone's blog, livejournal, myspace, etc. in which a couple carries on a conversation within the comments of the entry. Especially when they live together. You see each other every day! Have normal conversations, you know, face-to-face.

It's even more annoying when the comments consist of "No, I love you, more." or "You're the best husband/wife." Ugh, when I read that particular exchange, I think I threw up in my mouth.