How libido plummets once a woman has secured her man .

news.bbc.co.uk — A woman's sex drive begins to plummet once she is in a secure relationship, according to research. Researchers from Germany found that four years into a relationship, less than half of 30-year-old women wanted regular sex. Conversely, the team found a man's libido remained the same regardless of how long he had been in a relationship. Aug 14, 2006 View in Crawl 4