You are correlating the uncorrelated.
Noting correlations, unlike causality, is often very easy. Proving that something is uncorrelated seems rather difficult to me.
@opendoor described a correlation between the quality of embrace and relationship on/off. I described a correlation between the quality of embrace and the quality of the relationship, which finally didn't improve afterwards. None of this can be generalized., but you can share your personal experiences.
There was also some speculation about possible causalities.
The study you cite claims positive to negative ratio of 5:1 or more for a romantic relationship to be happy or not decline. Positive being complementary, etc. Negative being criticism, etc.
A bunch of studies ran for decades, and that was of course not the only aspect.
I had pointed out that the statement, one prefers dancing alone rather than with partners, might be perceived as criticism by partners.
What does that have to do with embrace or dancing alone.
For the studies, every sensitive touch, in type and duration, counts towards measuring sexuality, from the morning hug&kiss up to satisfaction in bed.
So for
tango couples, the
tango embrace definitely falls under the category of sexuality. And of course, a statistical correlation was found between sexuality and the quality and longevity of the relationship. I don't remember the details, though; the book is somewhere in the basement.
Another correlation was described by
@Brummbaer in a different thread:
I agree. I don't. Wisely I married mine.

And, when we were both working, with kids, we found practice time for our dance of the time. Might have been early at a weekend, or a lunchtime if we could both get to a venue.
So, if you get married
and dance together regularly for a long time, then you'll finally have been married for a long time.
