Being a sceptic is good. Stay sceptical. For example:
>More blood flow = bigger penis<
That’s bollocks. If it were the case penis enlargement pills would work. Temporary engorgement is one thing, enlarging the penis is another.
To answer your question about side effects. Yes there are and not all of them are good.
I suggest you continue reading and run everything through the most sceptical filter you can. If you then decide to try, consider that it’s very easy to convince oneself of something if one wants to enough and try to ensure that you have a method to overcome this and deal with the physical reality.
I apologise for not specifying more blood flow constantly, over a large period of time :P
The guys all make good points. Nobody here is going to take your money or try to sell you shit.