I think the point is that the fear of not being able to get it out easily would lead your jaw muscles to clench up. So somebody would have to basically trick you into thinking that the imitation is real.
Well, given that it could fit in, it could come out the same way. I have a rather large face hole, so I think it could fit. Is the meme meant to be that the lightbulb is too big for most people to even get in?
Use an ice cream cone. Saves the effort of making some elaborate food thing. And with a cone, you can just bite through it, after the the hard outer, the ice cream is just easy to bite through.
I think the problem comes.up when your jaw locks and its a bastard to move it. I get it occasionally when I'm eating or yawning.