The latter for me absolutely. Mosquitoes have never left any kind of mark or bump or bite on my skin. I can sometimes feel them biting (injecting? whatever) a

The latter for me absolutely. Mosquitoes have never left any kind of mark or bump or bite on my skin. I can sometimes feel them biting (injecting? whatever) and I smack/brush them away but that's the most nuisance they cause. I've always wondered why.