|How many pennies are in your jar?|
Sexual desire and sexual frequency do tend to decline over the course of a relationship. Several large-scale surveys have found evidence for this, and one study even found that the link between sexual frequency and relationship duration was stronger than the link between sexual frequency and age (Johnson et al., 1994). So young or old, sexual desire is likely to peak at the beginning of a new relationship and steadily decline from there.
But is that the end of the story? Once we enter into a long-term relationship, do we have to sit back and accept that our hottest days are behind us? According to recent research, not necessarily.