I found this on the Daily Racing Form website tonight. No Triple Crown, but War Emblem is so clever in the breeding shed I (almost) regret rooting against him in the Belmont:
War Emblem picking his own mates
By GLENYE CAIN
LEXINGTON, Ky. - War Emblem, the 2002 Kentucky Derby and Preakness winner whose low libido caused problems in his first season at Japan's Shadai Stallion Station last year, has covered about 50 mares in 2004, a dramatic improvement. In 2003, his initial year at stud, War Emblem covered only seven mares, getting four of those in foal.
Shadai spokesman Eisuke Tokutake explained that while War Emblem isn't any more interested in breeding than he was in 2003, the farm has found an unusual strategy that seems to help. They let him choose his own mates.
"Basically, War Emblem is the same in attitude as last year," Tokutake said through a translator. "So it is not like we can plan his matings or select mares for him to breed. What we do is tease him by showing him many mares. If he finds a mare he likes, he serves that mare. If he doesn't find any he likes, he does not serve any. One day he finds one or two he likes, and the next day he'll find none. As humans, we can't tell which mare he will like or why."
http://dailyracingform.com/news/article/55576.html