I don't know if it's Norway-specific anymore, but helgefylla is apparently a part of the ritual:
"The second thing you can expect from a drunk Norwegian is promiscuity often leading to sex. Wait a second I didn’t say Norwegians are promiscuous, not anywhere any time, but on a Friday or Saturday evening in bars, or in julebordet, or in after-ski parties: if you wait until alcohol level gets high enough, making-out and sex are likely to happen a lot. Between colleagues, friends, people who’ve never met each other and haven’t exchanged a single word. It’s called “Norwegian seduction”
. Note that an alcohol-free version of Norwegian seduction is also possible, through internet dating
. I don’t really understand how Norwegians, who tend to avoid any kind of awkward social situation, can wake up naked with someone they haven’t shared their name with, but it still happens a lot.
The third thing you can expect from a drunk Norwegian is emotion sharing and sudden intimacy. Also not very likely to happen in everyday life in Norway. Suddenly a colleague who never even says “hello” starts sharing life secrets and emotions about his/her divorce, or gives huge declarations of love or friendship. Do not expect any of this to survive the night: The next day the same Norwegian sobered up will not start saying hi or make any mention of whatever he or she said during what you thought was a great moment of connection and intimacy."
Source: https://afroginthefjord.com/2014/03/30/ ... norwegian/
Based on what I heard from opening-up Norwegians, they are very naive in love. Many stories about a woman who loved them - how much money they spent on her and what entertainments they provided expecting nothing in exchange... and then she left them - when they lost the job or she fell in love with someone else (more love-worth, I presume).