[MyDuke]

Duke has a stuffed penguin as his girlfriend since he was a baby.
Before he was neutered, he used to hump on the penguin. Now after he's neutered, he no longer humps but after every meal he takes the penguin by his mouth, runs around the apartment and cries.

I'm not sure what this means, he's been doing this for a few months now and I'm confused, can it be that he's "manly" frustrated?
Please help with any explanation or experiences you've had with this.