Stefan Bucher's Daily Monster #191

From Stefan's Blog:

Once again we appear to be faced with a happy creature. And who wouldn't be a little bit happy with fine green dungarees and some blue shoes? But is that the only reason 191 is happy? What else would make it smile so? Who is it giving a wave? Is somebody coming to meet it? Did it just part with somebody? What do they talk about when they're together? Is there small talk? Is there mutual grooming? What are the monster rituals for creating a social bond? By now, you all have masters in monster anthropology, so I'm counting on your insight once again. Would you please...