A new study suggests that older swingers, as a group, should be considered high risk for sexually transmitted infections.

Researchers from The Netherlands found that older swingers made up 12 percent of clients who visited an outpatient sexual health clinic.

Swingers older than 45 had higher rates of infection than men who have sex with men, heterosexuals and prostitutes — groups traditionally considered high risk. Infections were most prevalent among older female swingers.

Based on their findings, the researchers concluded that, “[s]wingers, like other groups with risk behaviors, need to be identified and treated as a risk group in STI prevention and care.” Right now, they are not classified as high risk.