Cameron Diaz doesn't know the definition of a lesbian. In the July issue of Playboy magazine, the "Knight and Day" star says that wanting to sleep with a woman does not make you a lesbian. "If I'm going to be with a woman sexually, it doesn't mean I'm a lesbian," she said, according to UsMagazine.com. "We put these restraints and definitions on people, but it's hard to define." Diaz started making a little more sense when she tried to differentiate between lust and love. "Sexuality and love can be different things," she said. "I can be attracted to a woman...