which is pretty ineffective since mosquitos are quite good at finding the body part that's uncovered. If you sleep like a cocoon and don't move i guess that works.
Point the fan at the uncovered part. Mosquitos tend to dislike fan airflow. Also works outdoors. The airflow also triggers your pressure sensors so spontaneous firing isn't an startling issue if the fan breeze hits something other than your head.
Obviously for use in the hot summer; also if you sleep with a fan pointed at you in Korea, you'll catch fan death and die. Cultural myths about fan death is an interesting sleep related topic. With respect to nature vs nurture, different cultures certainly do weird things such as fan death related to sleep but the vast majority cross culturally like blankets; that would imply blankets could be genetic in some weird way not merely cultural.
If only your face is uncovered, I think you are more likely to notice a mosquito, either by sound or by touch. On the other hand, mosquitoes can reach you through a net or thin sheet if it is against your skin, as I have found to my cost.
Where I live the state bird is the mosquito. Which doesn't really narrow down my state of residence LOL. Here I am daydreaming my way to sleep counting sheep and a touch/pressure sensor in my skin spontaneously fires as they sometimes randomly do, and ugh there's a mosquito or fly or whatever on me wake up and swat it. Now wrapping in a blanket means the pressure sensors saturate full on all the time so I don't startle. I suspect its worse for men with body hair. Randomly a leg hair catches airflow and red alert a bug has landed on me! Its the same as the tickle reflex, leaning on me while cuddling on the couch is comfy and sleep inducing, tickling is not even remotely sleep inducing.
Speaking of pressure, I sleep on my side with my legs partially up and if I force myself to sleep otherwise, I wake up in that position, so may as well give in. So... maybe TMI but without squooshing at least a thin blanket between my legs there's kind of a self inflicted thigh-vise on my male parts which as any male will attest is uncomfortable. This is a universal problem for males who lift weights and sleep on their side, unless you guys have invented an interesting hack for this problem...
I would hypothesize that a cover would restrict air flow around your sweat glands which would reduce your scent on the air around where you're sleeping. It would also mask the outline of your body. For insects adapted to bite humans, hiding these signals and providing a physical barrier would possibly reduce bite incidents. Reducing bites from potentially pathogen-spreading insects would have an evolutionary advantage.
