When I open the Grindr app on my smartphone, I see there’s a 26-year-old man with tanned abs just 200 feet away. He’s called “looking4now,” and his profile explains that he wants sex at his place as soon as possible.

Scrolling down, I find 100 similar profiles within a one-mile radius of my apartment in Boston. I can filter them by body type, sexual position (top, bottom, or versatile), and HIV status.

As a gay psychiatrist who studies gender and sexuality, I’m thrilled with the huge strides we’ve made over the past decade to bring gay relationships into the mainstream. The Supreme Court ruled that same-sex marriage is a constitutional right. Today in Boston, two men can walk down the street holding hands without consequence.

But I’m worried by the rise of the underground digital bathhouse. Apps like Grindr, with 3 million daily active users, and others like Scruff and Jack’d, are designed to help gay men solicit sex, often anonymously, online. I am all for sexual liberation, but I can’t stop wondering if these apps also have a negative effect on gay men’s mental health. Read more via Vox