Sort-of memes that are cracking you up at the moment

I think it's because it's a little sad.

The dog doesn't seem happy - it's bowing its head, looking at the ground, wondering if the humiliation is punishment (if so, for what?) or if it's something it has to endure for the enjoyment of its owner. Juxtapose this with the cartoon character's exaggerated face, a strange grinning contortion, somewhere between anger and fury, and you begin to see that the humorous picture (at first glance) is in fact a very revealing portrait of a dog's tortured existence. The cartoon character mask expresses what the dog can't, for fear of being muzzled, or even worse, put down.