Four Questions

Why's this night different from all other nights?
On other nights, we may choose what we eat
From either bread or matzah, but by rights
Tonight is only matzah. Either sweet
Or bitter herbs, on other nights, are right:
Tonight we eat only the bitter herb.
On other nights, we lean or sit upright
Tonight our leaning we must not disturb.
On other nights, we do not dip our food
Not even once; it is not customary.
But on this night it would be beyond rude
Not to dip twice: this custom does not vary.
So says the youngest of us who is able
Every year around the Seder table.