* Food and drinks: Cups, glasses, utensils, food itself.
* Skin: Their own skin (e.g., around their mouth, teeth), other people's skin (during kissing or hugging).
* Clothes: Collars, scarves, sleeves.
* Personal items: Tissues, napkins, handkerchiefs, masks, cigarettes.
* Other: Phones, pens, anything that comes into contact with their mouth.