Snark alert!! Major snark coming up. You can't see my expression as I type, so I'm letting you know now. I'm white and my fiancee is black so don't for a minute think I'm some kind of stealth KKK member or White Supremacist.
Don't say you weren't warned, and now let's go below the fold.
Members of the GOP consider that Ryan got lucky (in every sense of the phrase) because all Republicans know that black women are sexual animals who never have to be seduced. You don't need to woo them, you don't need to sweet-talk them, you just need to say, "How about it?" or walk up behind them and put your arms around them.
All Republicans know that white women are cold-hearted female breeding dogs who use sex as a means of controlling a man, grudgingly permitting him to have some physical relations in return for an enormous amount of bribery (such as furs or jewelry) or performing an immense number of "honey-do" tasks. They'll cut him off at the blink of an eye for any imagined tiny slight.
All Republicans know that black women cheat. They also know that black women expect their men to cheat. What this means for Ryan is that during this relationship he had carte blanche to step out. Never had to call with an excuse, never had to make up a story. "Where were you?" "I was out." "But where?" "I said I was out. Wanna do it now?" And he was good to go.
All Republicans know that black women love cheap trinkets, from all those years living in Africa and accepting beads from traders. You don't have to give a black woman diamonds or a Mercedes; paste pearls, glass necklaces, embroidered hand towels will warm her heart and fill her with delight.
This part of Ryan's history won't be an issue for the GOP. In fact, he will be the envy of the convention for his great good luck in the "battle of the sexes." He may even be their go-to guy for gender and racial issues.