I pretty much eat up everything Sam Vaknin puts out. He's considered a super expert and also has first hand experience as a cluster B. Pretty much everything he says rings true for me based on my experiences.

It is true that we are like dolls or teddy bears. Like you're there to meet my needs, even if I'm acting very nurturing or nice to you. And like a kid, sometimes I want to play nice, sometimes I want to fling you around or something.

The snapshot thing is also a similar deal. A really apt metaphor. They're not treating you as you really are. They think you're the snapshot because they've converted you into an internal object and would prefer to interact with that.