Skip to content
Navigating a New Political Landscape: View real-time updates about the impact of and Northeastern’s response to recent political changes.
Apply
Stories

Not dating your best friend’s ex may put you at higher risk of an STI

People in this story

Photo by Alyssa Stone/Northeastern University
Members of the Northeastern campus walk by the Egan Research Center holding hands on Tuesday, Jan. 4, 2022.

Don’t date your friends’ exes. That’s the unspoken golden rule of high-school romances. But while this might be a good habit for maintaining friendships, researchers in Northeastern’s Network Science Institute recently found that not dating your friends’ exes actually increases the likelihood that teenagers will be exposed to sexually transmitted infections compared to dating people at random. 

“Adolescents are about 75 percent less likely to date someone if that person dated their friend in the past,” says Cassie McMillan, an assistant professor and researcher in the Network Science Institute who co-authored the findings, which were published in the journal Social Networks.

Accounting for that statistic, McMillan and her team found that STI exposure among high schoolers is not merely a numbers game, as common sense would have it. In other words, transmission is not as simple as saying that teenagers who have sex with more people are more likely to contract STIs. 

Continue reading at News@Northeastern.l

More Stories

Twenty years of Boston University management of the Chelsea school system is coming to an end. At the John Silber Early Learning Center, kindergarten students enjoy play period at the start of the day. (Photo by George Rizer/The Boston Globe via Getty Images)

How a co-op at a Boston nonprofit changed this student’s view on early childhood education learning

07.02.2025
06/24/25 - BOSTON, MA. - Ericka Knudson’s new book Nouvelle’s Femmes is pictured in the studio on Tuesday, June 24, 2025. Photo by Alyssa Stone/Northeastern University

A study in presence: Recentering the women of the French New Wave

06.30.2025
A sign reading

Abortion bans have led to more relationship violence, new research finds

07.02.25
Northeastern Global News