Give me a break!!! UNLESS there is a medical reason for the absence of sex, then there is no real marital connection anymore if it is completely understood that at least one of the couple desires sex on a more than seldom basis. I am unfortunately an expert on this as my wife ended up with a strange issue that kept us from having sex at all for one year. Before that, we were very spontaneous and happy. Her bio-clock went off and our frequency was not good for what was deemend required to procreate (BTW - I have a child from a previous marriage... she hates kids), so we went into a doctor-tailored pattern of abstinence / screwing that involved hardships on me from a work perspective, etc. In the end, we gave up, I ended up getting clipped so as to avoid having children with her, etc. Bottom line, we were faithful to each other as far as I know, but other than that nothing to worry about from a kid perspective other than the happiness of my existing child. No pre-nup in the world would take care of that sitch w/o a LOT of foresight and advanced planning, and no post-nup will take care of it except from an "Oh Shit, I forgot about that $100,000,000 my dad left me" standpoint which is not likely to be taken care of legally by a post-nup. Bottom line... get a pre-nup regardless of what any one tries to tell you. It's just a documentation of the understanding that the two of you have before entering into wedded bliss. Will both of you contribute to the "booty chest"? Do both of you want kids? If one of you is not faithful, would the other simply like to know (e.g. swing) or void the whole thing. Yada yada....