For this grilled street corn recipe, it is best to remove the husk and all the silks before cooking. That way, the flames can come in contact with the corn kernels, giving them that delicious, smoky, charred flavor.  For other purposes, you might prefer to keep the husk on. For example, you can also cook corn on the cob by soaking the whole ear, husk and all, in water and then transferring to the hot grill to steam inside its husk.  Feel free to experiment with different ways of cooking your corn, but definitely remove the husk when it comes to street corn.