From Sex To Love: Women automatically get emotionally attached, and men quickly flee to the next sexual partner. Tap here to turn on desktop notifications to get the news sent straight to you. I've seen it happen plenty of times; I don't know many young people who would admit to being morally opposed to casual sex; and yet the idea that, in general, waiting as long as possible is just nebulously better still completely pervades our culture. Via author Kayt Sukel. Both phenomena activate a section of the striatum the part of the brain that receives messages from the cerebral cortex about emotions, memory and other functions. Psychologist Jim Pfaus and his research team sought to discover where feelings of love and of sexual desire originate in the brain.