Yep, love really *is* complicated. Hormones, neurotransmitters, sensory neurons, oh my!

Human Hormones - List of All HormonesHumans make and circulate over 50 hormones, thanks to your  amazing endocrine network of glands. Hormones travel through the blood to help different organs talk to each other. The pea-sized pituitary gland, located in the brain, controls the release of seven different hormones that regulate sex drive, hunger and growth. Credit to the Word Cloud Generator for generating this graphic.