The very ingredients that nurture love — mutuality, reciprocity, protection, worry, responsibility for the other — are sometimes the very ingredients that stifle desire.

Source: "The Secret to Desire in a Long-Term Relationship." TEDSalon NY2013. Feb. 2013. Conference Presentation. Additional Information: According to this quote from marriage therapist Esther Perel, the security and care-taking associated with a loving relationship actually hinder sexual desire in a relationship. The TED Talk this quote is from is about how to reconcile the conflicting needs for security and adventure in a relationship to keep romance and desire alive on a long-term basis. Watch the full TED Talk here: Esther Perel - The Secret to Desire in a Long-Term Relationship