"Show your affection with a sniff" Thailand Local Custom Tip by Suecia
Thailand Local Customs: 307 reviews and 224 photos
Let's say you've been on a date and the person likes you, they will give you a gentle sniff on the cheek instead of a kiss when the date is over. I'm not sure how common this is but I know atleast that it happens between younger thai couples.
(You can see some comments on this on a discussion I started)
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