The ladies love it!
Check out the voting demographics. Out of 30 female voters, half of them rated this a 10 and none less than 6. The actual average female vote was 8.7 (lowered by imdb to a "weighted average" of 7.4).
Is it partly the attraction of Marlon Brando you think? As a war/action film it's not what you'd expect to appeal so strongly to women.