Spontaneous sex drive is being ready from the sight of someone. Reactive is primarily mental with someone acting on them first, then they get turned on. One allows little restraint and the other adds many opportunities for disqualification and restraints. They are both opposites of one another and what men and women face. Men are mostly spontaneous and women mostly reactive. Men think that if they were the top male, a girl would have the same type of sex drive as him, which isn't the case. He gets upset when a woman doesn't allow sex right after seeing him because he only sees his sexuality. Woman think men should choose her because of her great qualities first and then decide to meet up with her, once she's qualified to him as that "special one". If not he's labeled thirsty and she's grossed out.Which is how she operates sexually. Testosterone is labeled as the aggressive hormone or impulsive for this reason. Estrogen is labeled as the caution hormone for this reason. There are outliers to everything but this is the general trend for each sex.