Minecraft Witches

Today, I comment witches. Witches are neutral mobs in the game that wander around until you attack them. They look like the NPC villagers but with a wart on their nose and a hat. With 13 hearts, these villager like mobs attack you with wands.  They drop glowstone dust, sticks, sugar,spider eyes, dude that is a lot of items! Now, I do not know a lot about witches. But why do they drop sticks?