Relationships and mental health

Sexuality sems to me as a long time married man quite a narrow view of thing so I googled on relationships and came up with some good advice.

Imprtance of supportive social environment for all ages:
 https://www.mentalhealth.org.uk/publications/relationships-21st-century-forgotten-foundation-mental-health-and-wellbeing
This is a short sumary of a free 44 page pdf on same subject, summary of 148 studies on social connectedness and mental and physical health.

Are these behaviours toxic or normal for couples?
https://www.brilliantnews.com/life/healthy-relationship-habits-most-people-think-are-toxic/?utm_source=google&utm_medium=adwords&utm_content=Relationship&utm_campaign=ADW009-BRL-healthy-relationships-geo&mma=kwd-14156100&gclid=Cj0KCQjwm9D0BRCMARIsAIfvfIYOosj8tPlHdPysfGh2hVL9s3hsCyfUCuxXI8Qk6w_3G1M2nBwOmZMaAlM_EALw_wcB

List of questions to determine lasting relationship:
https://www.independent.co.uk/life-style/love-sex/relationships-love-last-forever-questions-test-psychology-fifteen-questions-gary-lewandowski-a8243096.html

I have been married over 20 years and can't answer positive on all of above always. Not all relationships are perfect.