Why sex loses steam after just one year of relationship

People are happiest about their sex lives after a year into their relationship, and thereafter the frequency and passion in the action between the sheets gradually declines, a new study says.

The researchers questioned 3,000 people aged between 25 and 41, asking them on several occasions to rank their sex lives.

An analysis of the results showed that people were happiest about their sex life after a year into their relationship, marieclaire.co.uk reported.

And contrary to popular belief, having children doesn't have a noticeable effect of the quality of a couple's sex life, the study found.

"We did not find that having children played a major role in a couple's sexual satisfaction," said study's lead author Claudia Schmiedeberg from Ludwig Maximilian University in Munich.

She added that this is "remarkable" as research has shown that "sexual frequency is heavily influenced by the existence and age of children".

Rather than children, arguments were to be blamed for a decline in sexual activity, with couples asserting that more quarrelling led to less sex.

So if you want a great sex life, try to put the fights on hold, the findings suggest.