Yesterday, my Mom cooked this boiled corn or sweet corn for us. We received our share from our neighbors of this delicious food so my mom decided to cook some.
You don't need to add something in it. You just need to boil it until it becomes tender and soft to eat. Some street vendors add something to it to make it more sweet like margarine and white sugar.
But if you want to eat it naturally, no need to put those. Just eat it after boiling. It's delicious and healthy.