Corn On The Cob can be eaten raw if you want to eat it raw but it tastes so much better when the Corn On The Cob is cooked and it's easier to chew as well.
If you don't have good teeth then you may have a hard time chewing the raw corn on the cob but other than that it's safe to eat raw corn on the cob.
Corn On The Cob does not require cooking to eat it but cooking it makes it much better.