As well as skeeving us all out, swingers — couples who regularly swap partners at organized parties or clubs — may have rates of sexually transmitted infection (STI) that are higher than those in high-risk groups, like female prostitutes, a Dutch study found. Middle-aged swingers, over the age of 45, were particularly vulnerable to disease.

Moreover, the authors of the study said in a statement, swingers, who by definition get around a lot, “may act as an STI transmission bridge to the entire population.”