The act of being obsessed with someone in a particularly amorous manner.
S: Did you see Giovanny today?
A: No...why are you so obsexxed with him?!
S: He's so gorgeous!
A person who is obsessed with sex. Usually a horny teenager who thinks/talks about it all the time but can include famous politicians and athletes who get caught for their obsexxion.
Tiger Woods is so obsexxed that he had to go to rehab for his obsexxion.