Guuurrrlll. you need to read some Maya Banks. Check out this series:
The Colters have been doing it for years. I know it's fiction and sometimes not realistic, but it's good. I have wanted to be with brothers before. i still do but the chance of that happening is well, you know... rare.
i am actually really glad that you came here to post. this subject is something very dear to me.
if you want to read any of the books just let me know what you think of them.