He doesn't even carry a comb or a toothbrush. He moves so fast because he can't wait to be with his girlfriend. He is in love with her and hopes she feels the same way about him. The tempo is moderate. Instruments include a tambourine.
People have such a strong desire for love, they'd give or do almost anything to get it.
But the narrator warns his buddy not to fall for a certain girl. Other parts are fast. This song was previously sung by Bobby Vee . The narrator is in a hurry to reach his girlfriend, and the moderately fast tempo matches his urgency. He is traveling by train, and he tells the conductor to get the train moving as fast as possible.