Complex sentence: According to him, sexual drive is tantamount to drug addiction because a common addictive element is present in the two behaviours, the only difference being in the formation of psychoactive substances within an addict's organism itself.
Split into simpler sentences: According to him, sexual drive is tantamount to drug addiction. A common addictive element is present in the two behaviours, the only difference being in the formation of psychoactive substances within an addict's organism itself.