Look, not every guy is funny. But every guy thinks he's funny. When you appreciate his comedic efforts, he feels good about himself… and good about you as well. 'This girl I was out with kept laughing and smiling at my jokes,' recalls Evan*, 33. 'I liked being around her, and I'm sure it helped convince me that there was a connection forming between us.' Now, we're not advocating fake belly laughs, but a giggle can go a long way. What's even better? If you can crack him up in return.