Gnats fly around people because they are attracted to several things found on or around the human body. Primarily, gnats target exposed skin due to easy access. They are drawn to moisture and salt, which humans provide through sweat and tears. Body heat also attracts gnats, especially during summer evenings when they seek warmth. Additionally, gnats are attracted to carbon dioxide that humans exhale, odors such as sweat or perfumes, and certain pleasant scents like fruity shampoos and lotions. These factors make the human face and head particularly appealing to gnats, as they seek warmth, moisture, and salt essential for their survival. Evening swarms are also common because dusk offers ideal conditions for mating, especially when humidity is high after rainfall.