I was listening to "The Elephant Whisperer" on my way to & from (& back home) Kenya. Learned a lot about these giants e.g. besides communicating with ear movements & vibrations through the ground, their belly rumblings are another form of communication. They also identify newcomers to their turf by smelling them, as in #2. When elephants are in musk, they secrete a fluid from behind their eyes (towards their ears), as in #1.