I already had Coco once, like I mentioned it before somewhere on this board -interesting how perceptions vary, to me she was skinny, a twiggy but doable, perhaps because of her breast, without it I don't think she'd had any pull with customers unless your fetish is skinny girls. I personally wouldn't repeat but who knows.
Cumming fast is really a mental game, you could be very young? That doesn't help much, but you can learn to control the mental game, ubung macht den Meister, practice makes perfect.