Passion is an intense and irresistible physical feeling that needs to be satisfied. It's an impulsive feeling, usually unstoppable, that reflects the attraction between humans. Sometimes it's just a one time thing and others, the birth of a relationship.
Relationships can tense up if one or both partners are not achieving pleasure. There can be many reasons people in a relationship fail to reach orgasm – the important thing is to remain motivated in finding the reasons why. Very often the solution is more obvious than you’d expect.