Q: When my husband and I go camping, he gets eaten alive by mosquitoes unless he uses a bug spray with DEET. I hardly get bitten at all. Why is that? — Sallie M., University Heights, Ohio A: We YOU Docs are sure you’ve heard all the jokes — he’s sweeter than you are, etc. — but the difference in how often you two are bitten might be all about the microbes that live on his skin. Seems that for some of these blood-sucking insects (it’s always the females, males don’t bite) people with a lot of the same type of bacteria on their skin are more delicious than folks with a more complex mixture of microscopic tag-alongs. So perhaps your husband’s microbe mixture is simpler than yours. But there is another possibility: Your husband drinks beer, and you don’t. Mosquitoes are known to love the smell of beer as it wafts off a suds-drinker’s body — and eagerly go in for a bite.