yes baby do weird things, especially when they discover that part of their body can actually do this and do that. My baby is 8 mos. old now, he has two bottom teeth but before those teeth came out he also do a lot of tongue manuevres. There's the hanging, licking, clacking, rubbing and his favorite, biting his tongue in between his lips. I think it's because the gums are itchy and the tongue helps ease the pain. Also the drooling part, that's really amazing, it even wets his shirt and pillows. I remember wondering why is the bedsheet or pillow so wet,as if a water was spilled, so I did a thorough investigation and finally caught my LO's mouth salivation just did that. LOL