You gush about how your buddy's funny, smart, and in really good shape. Congratulations, you have a man crush. PLUS: share your opinions on this topic below.

-By Simon Dumenico
-Photograph by Matthew Monteith

Valentine's Day, of all things, for Timothy Ferriss to realize he had a man crush. "I was setting up a lunch with a friend of mine," says the 30-year-old entrepreneur, who lives in San Jose, California, "and he suggested that Thursday. I agreed, but then he wrote back, 'Oh, I completely forgot it was Valentine's Day—I don't know if you have plans to keep.' So I wrote back, 'Uh, well, that's why I asked you. You're my Valentine's date!'" Ferriss was joking with his friend; both are straight. "But then," he says, "it turned into this ha-ha, like, shoulder-punching exchange, where we were very awkwardly expressing that, yeah, we're cool dudes, we like each other—let's hang out. It was like a requited man crush."