Or is it that the victims pest warning system is currently winning the biological arms race, in which case how are mosquitoes able to successfully reproduce? Or is it that mosquitoes have evolved such that their spawning numbers offset the difficulty they have biting?
Biology is hard.
From what I know, when a mosquito stings you, it injects some stuff that prevents the area from hurting, probably so that you wouldn’t notice it, but the said stuff also makes the stings super itchy. I’m not completely sure about this though.