My ex was the sloppiest, loudest fucking eater. He even smacked unnecessarily when he was just drinking and not even eating (not to mention slurping much louder than what was necessary too). And the worst part is that often times, even when he wasn't eating or drinking anything, he would just fucking sit there and smack his lips for no fucking reason. We would just be laying in bed and then all the sudden I would just hear smack, smack, smack, smack, smack to the point where I would snap. He seriously ate like a toddler that hadn't learned to eat properly yet. It was seriously like hanging around a fucking cow. I tried talking to him about it as nicely as I could at first but he would just get all butthurt and throw a fit, again, like a fucking toddler.
This shit drives me insane and it's been an issue for me since I was around 8 or 9. My mom's the same way so I'm pretty sure it stemmed from her. It's funny listening to her snap at my dad for it.