Vietnamese Kiss
When someone moves their nose to your cheek and sniffs it.
Cousin: Do you know what a Vietnamese Kiss is?
Me: No
Cousin: (Smells shoulder/cheek and sniffs shoulder/cheek)
Me: Oh, my aunts do that all the time
Me: No
Cousin: (Smells shoulder/cheek and sniffs shoulder/cheek)
Me: Oh, my aunts do that all the time