What are the implications of the idea of sexual desire and romantic love being separate entities

What are the implications of the idea of sexual desire and romantic love being separate entities from our cultural norm of having one partner to meet all needs? and/or to sexual orientation?

Resources:

• Video: TED–Esther Perel: The secret to desire in a long-term relationship (19 mins) http://www.ted.com/talks/esther_perel_the_secret_to_desire_in_a_long_term_relationship.html
• Reading: Diamond, L. M. (2004).Emerging Perspectives on Distinctions Between Romantic Love and Sexual Desire. Current Directions in Psychological Science, 13(3), 116-119. https://www-jstor-org.csulb.idm.oclc.org/stable/20182926?sid=primo&seq=1#metadata_info_tab_contents