You can’t calculate intimacy with a quota

I’m 32 years old and my sex life with my girlfriend is brilliant, but friends in much longer-term relationships have warned me it will deplete over time, and become less exciting. Is it possible to stop this decline happening?

Habit is, as you recognise, a problematic aspect of any long-term sexual relationship, but long-term companionship offers such enormous physical, emotional and social benefits that most people figure the trade off is worth it.

However, as long as a relationship remains meaningful, familiarity does not translate into boredom. When you are single you are able to have lots of relationships with different people.