An olden times story I heard in the late 1940s in Chicago.--- About the guy riding his bicycle and was thumbed to a stop by a naked hitchhiking girl. He picked her up and didn't even seem to react. She jumped up in front of him sideways on the bar. After they had gone a ways, she said, "I've a secret to tell you. I'm naked." He responded, "I've got one for you too. This is a girl's bike."