DD's 22 months old and has recently started to ask for her diaper to be changed. It would be a great if she didn't ask all the time!

Right after we change her, she brings us one of her diapers and says, "pee pee". At first, she waited awhile and we'd end up changing her, even though she really didn't need changing (but she was wet). Now she's kind of obsessed with her diapers and always asks to be changed.

I want to encourage her awareness, but at the same time, I don't want to waste diapers. Anyone else go through this? Any and all advice appreciated!