As for his physique, he's got solid black guy genetics, so he works out very little and a little drop of medicine does him a lot of good. Even when he's not on, you're going to see good shape in his upper arms and delts. Lucky fucker.
Regarding the girlfriend, well, the fact that she's got so many masculine features certainly adds credence to the claims that Kanye is somewhat homosexual, which wouldn't be a big deal, except that he so adamantly denies it.