If I'm not mistaken I think this is the kind of thing that takes a lot more work on her part! I've heard of people teaching themselves to orgasm via breathing methods/other non-genital contact, but I doubt it's just a "poke her twice in the boob, spin in a circle and clap your hands" kind of thing. Orgasm is more of a mental process for women, whereas it's big time visual for men, so she'd probably need to concentrate like her life depended on it to climax via boob massage.
Also a lot of people think that women get all hot and bothered by men fondling their ta ta's, but for most girls it isn't all it cracked up to be.
Or maybe I'm way off and this is some kind of well-guarded ancient pimp secret.