the mosquitoes were attract to human sweat,but science has disprove that the sweat it self attracts them.Instead,they are drawn by the chemical changes produced by bacteria in your sweat.The mosquitoes are not attract to fresh sweat but they find bacteria in your sweat. They also found that malarial mosquitoes flock to foot odor. they will even bite a pair of smelly socks if you hang them up after wearing them for a few day.Not only do mosquitoes find some odors irresistible,but other have been found to impair their ability to find their hosts and some of these compounds are secreted by your body.