It's perfectly healthy and normal to want sex often. The body and brain want pleasure and the fact that you are so in touch with what you want is fantastic, so please remove the labels!
But being a bit obsessed with sex is also explained in several different ways, based on these elements: (test yourself)
masturbation
If you feel the need to masturbate much more often than you should, then you suffer from a psychological disorder that causes you to do so. Usually individuals with such disorders have the tendency to masturbate in inappropriate places and moments.
Pornography
Not all people who watch porn tend to be obsessed with sex. But if the need to watch videos or photos with pornographic content is unavoidable, it would be good to see a specialist.
Uncontrolled relationships
If you are ready to have uncontrollable intercourse just to satisfy your sexual needs, then most likely you are badly obsessed with these relationships.
Sexual urgency
If you find yourself urgently seeking sex, then you are most likely sex-obsessed.