Pain

...She was in one of the buses that had just pulled in with a big sigh of airbrakes; it was discharging passengers for a rest stop. Her breasts stuck out straight and true; her little flanks looked delicious; her hair was long and lustrous black; and her eyes were great blue things with timidities inside. I wished I was on her bus. A pain stabbed my heart, as it did every time I saw a girl I loved who was going the opposite direction in this too-big world.

Jack Kerouac, On the Road