Hormones are brain chemicals that play a large part in our development, our behavior and our feelings, by transmitting neural signals from neuron to neuron. Endorphins act like morphine and are the body's natural painkillers. Endorphins go to work when we exercise, have sex or hang around a loved one. They result in a feeling of well being and contentedness. Dopamine and noripenephrine are at work when you feel the giddy high of love and attraction.
Dopamine also stimulates the production of oxytocin.
Oxytocin may play a role in the emotional attachment between people, and it also makes females sexually receptive. It is involved in lactation, the menstrual cycle and stress. Oxytocin plays a role in sexual arousal and orgasm in both men and women. You probably know the effects of adrenaline on the heart and body from exhilarating or frightening situations. Adrenaline is also involved in sex and orgasm.