LONDON — Paul McCartney says he got no thrill from heroin, but found cocaine more to his liking for a time. "I tried heroin just the once," McCartney said in interview published Wednesday in the Daily Mirror newspaper about his drug use in decades past. (snip) "A song like 'Got to Get You Into My Life,' that's directly about pot, although everyone missed it at the time," McCartney said. "'Day Tripper,' that's one about acid (LSD). 'Lucy in the Sky,' that's pretty obvious. There's others that make subtle hints about drugs, but, you know, it's easy to overestimate the influence...