outhouse
Atheistically
Human courtship behavior is learned, otherwise it would be the same for all of us every time in every region and in every culture.
Incidentally, sociologists consider culture the driving factor in human behavior as intelligence replaced instinct. And this can be seen throughout the animal kingdom, not just with humans. As animals decrease in intelligence, their reliance on instinct becomes stronger, the more intelligent a species becomes, the fewer instincts they have.
This is a quote from the same wiki article you referenced to support your opinion.
Yes a fringe position. At this time your opinion is still unsubstantaiated.
We are a animal and all animals have instincts