Researchers from Macquarie University recruited 82 heterosexual women to rate the body odour and faces of men aged between 18 and 35.
In the experiment, singletons had to work up a sweat before women smelt the armpits of their worn t-shirts.
Results showed that when it came to smelliness, women rated single men on average 3.5 out of 6, while their coupled up counterparts rated slightly lower at 6.
Interestingly, females also found that bachelors appeared more masculine than those in a relationship.
"Consistent with the hypothesis, single men’s B.O smelled stronger than partnered men’s B.O and single men’s faces were rated as more masculine than partnered men’s faces," write the researchers.