So here I am, in a bar near a tourist section of Boston. The upstairs is crowded, and people are dancing to the music some guy is playing in his Mac, over big speakers. There is a boy-girl couple on one side of the dance floor. A young attractive pair, jerking and twisting to the music that is blasting until my teeth hurt. Her body is swinging frenetically, swinging her hair and arching her back, her butt pressed against her partner’s front as she tosses her head back in an expression of disco ecstasy. Her boyfriend sways his body, more or less in the rhythm of the music, his face casting off an almost blue shine. Just out of her visual range, he is texting.