Same with my spouse. I find mosquitoes mildly annoying — Deb will be scratching for days. Similarly, we both sat on a bedbug-infested couch, and while Deb had red welts on the back of her legs, I was ignored. (Which caused me to voice doubts whether there were really any bugs. My thorough examination, backed by Internet advice, turned up nothing. Exterminator came in, lifted a cushion, pointed. Oh.)