The well recognized double standard means that sex related scandals only affect republicans.
Not true.
Scandals have become so commonplace that neither side is effected much; look at Weiner and Spitzer; democrats running for office again.
What damages the GOP brand with women is the constant assault on their reproductive rights and the refusal to back such things as equal pay for the same job. The outliers are the Akin's who go over the top and think that you can will yourself into an abortion.