A work colleague who grew up in Nigeria told me he saw a pregnant woman casually picking off pieces of a mud daub hut and eating them, and his mum reacted like it's perfectly normal during pregnancy! I guess that woman must have been lacking some mineral to get cravings for eating mud
I get lots of morning sickness when pregnant, and eat lots of fruit to get through it. But once the morning sickness settles down, I just crave everything with sugar and fat in it! Luckily, my hubby gets the nesting urge around that stage of pregnancy - and his nesting is usually to bake lots of cakes
I do remember a horrid craving for roast lamb once in my first pregnancy. Wierd, because I'm vegetarian. But I happily gave in to my craving in the hope it would get rid of the morning sickness. It didn't, but it felt SOOOOO good to give in to that craving.