Male fruit flies enjoy ejaculation
A probe of the brain’s reward system looks at Drosophila sex (or lack thereof) and drinking
![fruit fly](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/04/041818_SM_flies-sex_feat.jpg?fit=860%2C460&ssl=1)
RED-LIGHT DISTRICT Levels of a brain reward compound increased in male fruit flies genetically engineered to ejaculate when exposed to red light when the insects were bathed in the rosy hue.
Avi Jacob/BIU microscopy unit