|Come... look inside... yeah... that's it... just a little closer...|
As a child I had always assumed that was so that browsing men could observe and assess the engine because all men were supposed to know what a fine looking engine looked like.
But now that I am a full grown man, and one that has spent more than a few passing moments pulling apart engine parts and putting them back together, if I were to look inside a gaping Camero I quite honestly would't get anything out of it.
I'd be like... so.... that's how the hood opens. Huh.
So, the only conclusion I can think of is that it gives the rookie salesmen something to do at the beginning and end of the day. It's sure to be extremely important. Particularly on rainy days.