Being spiritual is not about having a lack of desires.  It’s about having those desires flow through you so that they do not control you.  You can then choose whether you want to embrace the desire or to let the desire pass through you and disappear.  If the desire does not flow through you then it either takes you over or resistance to the desire causes suffering.  By acknowledging the desire you remain separate from it.   The goal is for you to choose rather than for the desire to control. 

A corollary:  The reason that so many spiritual leaders remain celibate is because they have detached from their desires.  No person in the history of the universe has ever *needed* sex.  A species, perhaps.  But those who are so completely detached from their desire for sex that they do not pass along their genetic code are few enough to be no threat to the extinction of the species. If a worldwide shift were to occur enough people would still choose to have sex to propagate the species,  although the population may decrease.