But to answer your afrocentric question, the different empires each had their own established slave networks and infrastructure in Africa (logistics as has already been stated), see: 1  Arab slave trade. 2  Barbary slave trade. 3  Slavery in the Ottoman Empire.
Asparagus is a vegetable belonging to the lily family, which also includes onions, leeks and garlic. Eat asparagus as part of a heart-healthy diet, as it contains no fat, no cholesterol and very little sodium.
Maybe (not) . . .: Urine can smell funny after eating asparagus so perhaps it's just due to a change in diet. But if you're at risk for a sexually transmitted disease (std) or infection b/c unprotected sex in a non-monogamous relationship, then go see your family doc for testing.