User blog comment:AYET/A devil fruit... in reality!/@comment-3104471-20120226081838/@comment-4754162-20120226100721

Good point, while its obvious to you (only eat 1 fruit otherwise we die), some may try to be creative and eat more than one. If you have seen the comments from the original blog (which was a lot of fun), then you'll understand why I need to state so clearly