Is there any "science" behind why my dog is so obsessed with actually eating the squeakers in his toys?

Sure, I totally get that he wants to tear his toy apart and get to that thing making the sounds, and sometimes he just wants to crush their little plastic larynx and leave it at that, but sometimes he gets in there and really starts piddling and picking and eating the whole plastic thing. I catch him in the act when he does it, and he only gets toys on supervision because now he can't be trusted alone until the squeaker has been removed.

I just don't get why the plastic? It can't taste good, like even cat shit's gotta taste better than that. I'm just wondering if there's any smarty pants on here that could tell me why my dog is so obsessed with literally trying to eat these things?