Memory Eraser...like the ones in MIB...so that you can instantly take back things you say and t won't remember you said them.

T: and when was the last time you felt this way
Wiki: the time when I was with dad and...blah, blah, blah
T: What were you thinking when your dad blah, blah, blah
Wiki: *beep*
T: Where were we?
Wiki: I was telling you about my dogs.