Re: I and my brothers size
i think ill pass on answering your first question but...
We are brother so will we have all the same size? most likely youll be similar sizes (not exact) but you might end up smaller or bigger than him. genetics is a mysterious thing
The amount of cum depend from the penis size? no it depends on your genetics, how long its been since u last masturbated and the time you take between masturbating. i think diet has a small effect on your ejaculation but i dunno for sure
no offense but your story sounds odd, like you're just here to fish for penis sizes and stories... i hope im wrong