Celery [traditionally an aphrodisiac] sends mixed messages. The ancient Greeks associated it with death: tombs were trimmed with it, and the dismal classical catchphrase “He now has need of nothing but celery” meant that some unfortunate Greek was about to kick the bucket.
From “Sex and the Celery: Ancient Greeks Get Busy With Help From Veggies” at http://theplate.nationalgeographic.com/2014/05/20/sex-celery-ancient-greeks-get-busy-help-veggie/