Who here wears a face mask properly? You should wear a fresh clean mask every time, avoid touching mask, wash hands thouroghly before removing and before putting one on, make sure it is well fitted covering both your nose and mouth.
So basically when you eat, you would need to wash hands before taking it off, then wash hands before putting a fresh one on, so surely that is impossible and therefore unless you never eat/ drink while out and about, you are doing it wrong.
And on the subject of food, how can it be that you just take the mask off to eat? I went to the mayflower to watch the panto, you were asked to wear a mask at all times unless exempt apart from when eating your snacks and drinks, even though we were all shoulder to shoulder with complete strangers!
If you want to wear the mask and you are doing what you want to make yourself feel comfortable, then that is all that matters.
Some people have a 5 second rule for dropped food, others would not eat anything that has hit the ground, that is the person's choice.