Author: University of East Anglia
Author Contact: uea.ac.uk
Published: 8th Sep 2023
Peer-Reviewed Publication: Yes
Additional References: Sexuality Publications
Summary: Study reveals the number of sexual partners we have changes as we age, and there are some surprising results.
Researchers from the University of East Anglia (UEA), in collaboration with King's College London and University College London, surveyed more than 5,000 people aged 18 years and older during the 2022 mpox (previously known as "monkeypox") outbreak.
The team wanted to better understand how sexual behaviours change with age, so that mathematical models of sexually transmitted infections can be made more accurate. Key findings included in the paper, published today in the journal PLOS ONE, show that many gay and bisexual men over age 70 continue to have a sex life with multiple partners, while straight women become less sexually active after age 50.
Lead researcher Dr Julii Brainard, from UEA's Norwich Medical School, said:
"Before this study, many models about sexually transmitted diseases assumed that everyone over a certain age - say 40 or 65 - stopped being sexually active, or at least stopped having multiple partners."
"Or there might be an assumption that young people have the most sex. But the answer is more nuanced, and it partly depends on people's sexuality."
The study is based on a survey of 5164 British people, including 3297 sampled from the general population and 1036 men who have sex with men (MSM) recruited via Facebook and Instagram. A further 831 people responded to adverts on the gay dating app Grindr.
"The 2022 mpox cases spread mostly among men who have sex with men, so we particularly surveyed this group," explained Dr Brainard.
The participants were asked for their gender, sexual identity (gay, bisexual or heterosexual) and how many sexual partners they had had in the last three weeks and in the last three months. The answers were divided into the three largest groups that each had more than a thousand responses: women who have sex with men, men who have sex with women, and men who have sex with men.
The team focused on the relationship between sex partner counts in last three weeks and respondent age, using statistical models to see how much a person's age was linked to their recent partner count.
Dr Brainard said:
"Most people in our survey, regardless of their gender identity or sexuality, had zero or one recent partner at any age."
"We managed to collect a lot of data from MSM who practiced partner concurrency. About 45 per cent of them sustained partner concurrency from age 27 to 63. Even at age 65+ the respondents recruited via social media still tended to have more sexual contact than the general population sample at the same age."
"It would be interesting to see if these findings were replicated if we targeted heterosexuals most likely to practice partner concurrency."
"Models of disease spread shouldn't assume that young people are necessarily most at risk or that having multiple partners just stops happening at a strict age threshold."
The information about age profiles and sexual habits is useful because it helps to tailor safe sex messages at the right demographics and using media channels that best reaches these subgroups. Research Fellow Dr Louise Smith at Kings College London coordinated the survey in autumn 2022 to collect information about public awareness of mpox and what public health messages might be most motivating for different sub-groups.
Dr Smith said:
"This study underscores the importance of considering how data were collected. For instance, we can't conclude from this survey that MSM who use social media are particularly likely to have concurrent partners. But it may be that the algorithms that Facebook or Instagram use to identify MSMs are also very good at finding that subset of people."
"At the time, mpox mostly affected gay and bisexual men so we focused recruitment on this group. Because we didn't recruit very many lesbian and bisexual women, or members of the trans community, our statistical analyses would have been less reliable for these groups."
"Further research into other minority sexualities and gender identities could be beneficial to better understand the granularity of sexual behaviour and optimal public health messaging suited to different groups of people in the UK."
This work was funded by the National Institute for Health and Care Research.
'The relationship between age and sex partner counts during the mpox outbreak in the UK, 2022' is published 8 September 2023 in the journal PLOS ONE.
Sex Lives in Britain Revealed | University of East Anglia (uea.ac.uk). SexualDiversity.org makes no warranties or representations in connection therewith. Content may have been edited for style, clarity or length.
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• (APA): University of East Anglia. (2023, September 8). Sex Lives in Britain Revealed. SexualDiversity.org. Retrieved September 23, 2023 from www.sexualdiversity.org/sexuality/1179.php
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