Cockefair Chair

There's always that one friend whose obsession leaks into every conversation. Wendy Perron, dancer, choreographer, and writer, says, "I'd be talking about dance so much that friends would say, 'Just shut up already.'" Despite the advice, Perron has built a career around documenting changes in dance and choreography since the 1970s.

Do you remember that friend your mom said was no good? Or that buddy your dad said was a bad influence on you? As it turns out, they might have been right.

In the first part of Monday's Up to Date, we talk with Carlin Flora, author of Friendfluence: The Surprising Ways Friends Make Us Who We Are, about how friends shape our personalities and help create the mold for our attitudes and future actions.