Thanks very much for your reply!
Well, so I would say on the one hand that I can certainly see how celibacy would be useful if one were working on something all-consuming. And it seems that in the context you describe a lot of the issues that one normally associates with abstention and denial (e.g. in Catholicism) simply aren't there. Celibacy begun at a particular point in one's life makes much more sense to me than the idea that sexuality is somehow orthogonal to one's spiritual development from the beginning, even before the spiritual path acquires the urgency which makes one reduce other distractions. So this part of your answer makes sense to me -- thanks.
There's another layer to this which I'm curious about, though I'm not sure how well I'll be able to express it. It seems to me that in one's pursuit of the holy, a natural step would be a kind of sanctification of everyday life -- an understanding of the resonance of one's various physical desires. For instance, the constant cycle of hunger and eating can, I think, become quite a beautiful reminder of one's openness to nourishment, the sustaining richness of the world and so on, provided that it is done mindfully and that one also is reasonably sparing. In fact I would go further, and say that this cycle, because of its tie to the body and its reminder of physicality, is also intellectually useful in a spiritual context -- we are, after all, physical creatures, and presumably it is the correct understanding of our physical life which will give us insight.
But the emphasis on celibacy in many religious traditions implies that sexual energy is not something which is thought to be useful in this way. Why is this? Is it too distracting? too dangerous? too banal? too erratic? Is it simply something which, empirically, people are not particularly good at dealing with and so most well-run religious institutions are smart enough to avoid? That would be my guess, but I'd still be interested in the philosophical question. Is sexual energy something which is accessed on a different level when one turns to mainly spiritual and intellectual pursuits? Or is it simply not that important?
Would appreciate any thoughts.