jealousy is good, but only a certain type of jealousy. If I walked into a restaurant and saw my girlfirend sitting alone at a table with another guy eating lunch or whatever, I wouldn\'t be jealous. I would assume that it is one of her friends. it is healthy for people to have friends of the opposite sex. on the other hand, if I walked into the smae restaurant and saw them making out, that would be another thing altogether. it is because the love between a man and a woman is reserved between the two of them. it is natural to have a bond between one man and one woman, when that is broken that can cause jealous feelings, it is becuase we love them so much, we don\'t want to loose that love. and the sight of another man kissin my girlfriend would suggest to me that she doens\'t love me anymore and has gone to someone else. That kind of jealous feeling is normal, and good to have