Dogs are master manipulators and they take subtle and devious ways to get you do things like stroking your hair and giving them treats. They can even change the strategies occasionally, as the frequency of these trickery increases, leaving us naive. This canine behavior usually starts out cute but eventually becomes annoying. One of the two ways to fix this problem is to stop giving them rewards and treats for these behavior. If the problem persists, the second one comes and for that, you just need to ignore these behaviors completely or just put them in another room.

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Ask the Dog Trainer: Masters of manipluation ? TCPalm.com (User story from Cissy Sumner)