As far as I remember kissing on the cheek came in in the 1970s, hugging was mid-1980s, I think.
Having spent a lot of time in Spain I don't mind kissing on the cheeks, but am less keen on hugging.
Before the mid 1970s Danes shook hands ALL THE TIME, not just when you were introduced but going home from a party, saying good night, thank you for a present or congratulating people or saying thank you for a meal.
Boys bowed when shaking hands, girls curtsied until they were out of school. A lot of men bowed when shaking hands with a woman.
All that went out when kissing came in, along with the formal pronoun. Much regretted by me, I don't care to be on informal terms with my gynaecologist, dentist, etc.