The fact that the person who you are sleeping with is also sleeping with another person or other people does not necessarily mean that he or she does not love you. And the fact that you are the only person who someone is sleeping with does not necessarily mean that he or she loves you.
A person acquainted with the true principles of this science, who preserves his Dharma (virtue or religious merit), his Artha (worldly wealth) and his Kama (pleasure or sensual gratification), and who has regard to the customs of the people, is sure to obtain the mastery over his senses. In short, an intelligent and knowing person attending to Dharma and Artha and also to Kama, without becoming the slave of his passions, will obtain success in everything that he may do.
the English explorer Richard Burton told the story of an Englishman finding his new wife unconscious on the marital bed, having chloroformed herself. She had pinned a note to her nightdress which read: 'Mama says you're to do what you like.