Old age does mean people lose charm of sex at this stage of life, according to a new study.

A third of men aged 75 or older have sex at least once in a year, as revealed by the researchers from the WA Centre for Health and Ageing and those men have more urge to do sex. The elderly men who were not sexually active have health related issues or are without partners.

The findings of the study are based on a survey of about 2,800 elderly men aged 75-95 in Australia. Around 40% of men aged 75-79 involved in sexual activity during the previous year and this figure was 11% in those aged 90-95.

Around 49% of all the respondents responded that they thought sex somewhat important and 31% of the elderly had sex with another person at least once during past 12 months.

The reasons for majority of the elderly men remained sexually inactive were health issues, including lower testosterone levels, a partner's lack of interest in sex, osteoporosis, prostate cancer, diabetes, depression and blood pressure. In some cases the partner was not interested in indulging into sexual activity.

The authors said, "Although older men are less likely than their younger counterparts to be sexually active, sex remains important to many older men, even in the tenth decade of life".