Going by a popular DF theory, is Enel the first one to ever eat the lightning fruit?
The popular theory I'm going by is there is only one of every kind of fruit. Also, that when a person dies, the fruit is formed again.
Enel, as far as we have seen, is immortal. That means he was the first one to eat the lightning DF fruit, because if someone before him had eaten it, that other person would still be living.
Even submerged unerwater, I think Enel could still live ( although he would be immobile ). When Luffy was underwater, his DF ability still worked. He couldn't control his DF ability, but it still worked. Same thing for Enel. One of the advantages of his DF is that when he dies, his heart would restart. After drowning underwater, his heart would automatically restart. Since it's impossible for Enel to control his DF when he's dead, this can only lead us to believe that this advantage would happen automatically.
So, as I've said, Enel is immortal. Even drowning can't kill him. This can only show us that Enel is the first person to ever eat the lightning Devil Fruit.
So, I'm just wondering if there is something I might have missed that can prove my idea wrong.