The term is called Gonads.
Answer:
X-ray crystallography diffraction imaging, nuclear magnetic resonance spectroscopy imaging and frozen electron microscopy three-dimensional reconstruction technology.
Explanation:
http://www.creative-biostructure.com/protein-crystallization-and-structure-determination_13.htm
Apparently it is caused by the sex hormones, testosterone, and oestrogen. there. that is the chemical reaction of lust.
