Physical affection (hand holding, hugs, sitting close together, kissing, massages…) leads to better and more frequent sexual intimacy, with a higher level of orgasm and greater relationship satisfaction. Of course, if there’s ongoing tension and conflict in the relationship, then that leads to a cycle of less non-sexual contact and a lower quality and quantity of sex.

That’s why it’s so important for couples to have good communication, especially regarding difficult issues that require productive, non-defensive discussions. ‘Easier said than done’ – get professional help if you need it. A negative emotional state leads to less affection and less sex. A positive emotional state leads to more affection and a better sex life.
https://www.psychologytoday.com/us/blog/the-attraction-doctor/202111/how-routine-affection-can-lead-more-and-better-sex