Hi All:
At the risk of sounding rather "un-prudish" (as it appears everyone has the mistaken notion that if you're going to develop spiritually, you need to forsake the "earthly" pleasures), I'd like to say that the notions you're having that sexual energy can be "wasted" are all a bunch of bunk. 
You cannot "waste" that which is eternal and permeates everything everywhere.
Priests (at least in the Roman Catholic church) are required to remain celebate, NOT for spiritual purposes, but because in the early church the MARRIED priests were passing on their holdings to their offspring, and the Church was losing too much property.
Priests in the Eastern religions refrain from sex, not because it "wastes" sexual energy, but because sex is seen as a deterrant to keeping the focus on purely spiritual development. It has nothing at all to do with the energy being lost if one engages in the sexual act.
It is also quite possible that there is a gradual disinterest built up in having regular, normal sex as one progresses in spiritual development, because the fulfillment we normally experience from having good sex is also fulfilled, and sometimes in an even greater sense, as one's meditation deepens (it's called "estatic trance"). It can also have the effect that one actually appreciates more the sexual experience, as ones spiritual nature develops.
We are not separate from our spiritual nature - at times it is more sublimated and not recognized - but it is ALWAYS there. It's learning how to recognize it in ALL of its functions and facets that brings us to enlightenment.
Cheers!
Unis 
