Seratonin...

    * effects our moods and feelings
    * it is believed to play a role in our anger and aggression as well as sexuality
    * causes Obsessions
    * and causes Compulsions

In the utterly confusing science of love we find that multiple chemicals play a central role. Above, you can see the functions of the chemicals dopamine, serotonin and norepinephrine.

A combination of three different chemicals cause what we call: Infatuation (or Chemistry).

Phenylthylamine
(speeds Information flow)

Dopamine
(makes you feel good)

Norepinephrine
(stimultion of the heart  rate "adrenaline")

Infatuation
(puts you on cloud-nine)

The crazy thing is... your body will build up a tolerance to these chemicals and then eventually require more to get the same “love high”.