To katq:
You may have a point here. According to "hardcore" courtship theory (Joshua Harris et al), "eros" will build up naturally bit by bit every day during the 2-year process, so that the expectation is that on wedding day the couple will be so in love with each other, that the marital embrace will happen just smoothly and beautifully in a trusted and family atmosphere, and because they're both virgin, they will not be able to compare their partner to someone else. This sounds kinda idealistic, though, but as you say, everyone has their own beliefs, as in my personal case I know I just could not even kiss a woman I'm not married to--let alone the whole thing! Now, given the kind of replies in this thread, now I see that the long-distance courtship is just impossible during a PhD, unless it started before it, and if it survives it, the relationship will be stronger than ever. Any data on this?