It's not a massive deal, just slightly odd from the (presumed) parent. I was sitting opposite a boy who looked around 12 and a middle aged man.
The boy was eating sweets with his mouth wide open, I know some children don't always eat with their mouths closed, especially toddlers, but the noise it was making was so loud and it was like he was opening his mouth for the dentist every time.
It wasn't nice manners really, I know it's not my child or my business. I probably looked at him a second longer than I should've done, I didn't have any earphones to put in and train was packed out.
The father must've seen this because he asked the kid for a sweet, then proceeded to eat it in the exact same mouth wide open manner, staring at me. I understand i shouldn't have looked at the kid but the Dad knew what he was doing, and I found it a bit intimidating. Does this sound odd or was i in the wrong?