Aah normal je lah, especially at this age, babies explore everything dengan mulut dan tangan diorang! Mine pon gitu, puking pipi sendiri, puking my face, puking everything within reach haha. Biasanya lepas few months akan slow down once they realise it's not that interesting anymore, tapi kalau cheek-pinching gets aggressive or dia nampak frustrated, tengok je what's triggering it, sometimes boredom, sometimes teething discomfort. Jangan worry sangat, it's a phase!