Study: Single men are smellier

Building off of prior research that found single men have higher testosterone levels, researchers recruited men to work up a sweat, and had women then sniff the armpit of their T-shirts to see if there were detectable differences in smell.

Not only did single men have a stronger body odor, but the study found women also rated their faces as more masculine than the men who were in relationships.

In the new study published to the journal Frontiers in Psychology, researchers from Macquarie University set out to determine if single and partnered men smell different based on their differing testosterone levels.