Pet rat humping *UPDATE*

This is what her behavior looks like now, I'm now 100% certain her humping my arm and hand was her becoming a lady and getting her hormones. She's way less obsessive about this chase game as well, before she would NOT stop asking for it, wanted to chase constantly, so I stopped playing it with her at all for a long while. In this clip she voluntarily stops playing on her own.
Original video: • Pet rat humping arm