Though EmpowHer note that this doesn't mean men have a higher sex drive than women just that “the two sexes just respond differently to stimulation.”

In an article about sexual differences between genders, Sex Science comment that: “Women tend to be more flexible throughout their lifetime in their sexual orientation and preferences for certain sexual activities compared to men, who tend to hold relatively fixed approaches to sexuality.”

Within the context of intercourse frequency, this mercurial attitude towards sex and preferences could mean that, while men are more constantly aroused by the same things, women outgrow their initial sexual desires and so over time become less satisfied by their partners learned pleasuring techniques.

A separate study by sociology professor Edward O. Laumann found that “sexual desire in women is extremely sensitive to environment and context”.

This could offer a further explanation as to why passion peaks after a year. Changes within the relationship, such as moving in with a partner, and outside of it become intertwined with sexual desire for women.

Revealed: experts say this is the point when the passion will leave your relationship