"Before too long, the sex that had previously dominated our r..." — Andy Marr quote meaning

Before too long, the sex that had previously dominated our relationship became less urgent, and it wasn’t unheard of for us to postpone it in favour of a new series on Netflix or a quick snooze on the sofa. Dinnertime moved from the kitchen table to the living room sofa, where conversation was quickly replaced by the Channel 4 News. We stopped bothering to suppress our farts and gave up timing our toilet breaks so we wouldn’t inflict our smells on one another. Phone calls to friends grew longer and more frequent, and when we left the flat alone for a night out with mates we secretly rejoiced at the promise of a few hours of freedom. This isn’t to say that things were any worse than before; it was just no longer the free ride that we’d enjoyed during those first heady months of our relationship.