3-200 Muhammad ibn Ali Majiluyih - may God be pleased with him - narrated that Muhammad ibn Yahya al-Attar quoted Muhammad ibn Ahmad ibn Ali al-Hamedany, on the authority of Al-Hassan ibn Ali al-Kasa’ee , on the authority of Maysar (ibn Abdul Aziz) - the seller of black slaves - in the presence of Khalid that I heard Aba Abdullah as-Sadiq (MGB) say,

“Eat onions since they have three characteristics: they make your mouth smell fresh; they strengthen your gums; and they increase your sperm and sex drive.”