Notorious charmer John Mayer has his own special way with words for female fans. While out recently with comedy Web site College Humor’s Ricky Van Veen at Wicker Park on the Upper East Side, a young woman approached him. According to our source, midway through the conversation, ever-smooth Mayer laid down a line on the fan, claiming that he could see her future — “He said that she was going to make someone very happy one day, as long as she remembered to talk dirty while having sex,” the source said. The girl walked away speechless. Frequently misunderstood Mayer is famous for his poetic, lady-killing lines. He said of ex-girlfriend Jessica Simpson earlier this year, “Yeah, that girl is like crack cocaine to me. Sexually it was crazy. That’s all I’ll say. It was like napalm, sexual napalm.” A rep for Mayer didn’t get back to us.