Why do some spider or insect bite humans who prefer a particular person and not another?

I have curiosity Why mosquitoes, fleas, spiders, or prefer to bite a person over another. My girlfriend and I had a kind of insects in our house a few times is a bit everywhere, but all I have left alone. From what we can think, it could be two different things. Number one: have some type of chemical or hormone that attracts and I did not. Number two: We bite them both equally, and is a bit more sensitive to their bites and therefore bumps and red spots to prove it, even if I do. Any the tickets?

Mosquitoes prefer patches of bare skin. So if someone has a bald head, he / she may be more likely to be bitten. For this reason, chimpanzees can be better protected against mosquitoes like this the naked ape. Http: / / LOL mcaaron.files.wordpress.com/2007/12/bald-monkey.gif.

Categories : Arachnids