I don't think that it is plainly hypocritical for Newt Gingrich to judge Bill Clinton for his infidelity and that the public has the right to know and yet claim that his own infidelity should be private. I don't think Gingrich's hypocrisy makes open marriage correct. I don't see any reason to change the definition of traditional heterosexual and monogamous marriage. However, Gingrich inability to remain faithful to his wife (and being unapologetic about it), sure doesn't fill me with confidence that he would be a good President.
Open Marriages Aren't Wrong–Newt Gingrich Is - News - GOOD