In fact it means is they have a secret... door saying that they can be trying to convince themselves that they don't have secrets of it could be a facade to make sure other people won't pry door asking personal questions... Either way i think if a person says that they are lying because every person always has a secret which they may feel scred of embarrassed to share..
Yeah, right. Have u ever noticed how quickly most of those people say it? And how high and squeaky their voices are? Not always, but sometimes. Pfft, give me a break.
