chromosomes

My baby daughter doesn't enjoy fart noises. I don't get it. It's one of the things I'm actually good at - I haven't had to use my crelbow to do it since age 10. Aren't we genetically programmed to enjoy hearing that sound (fake variety, of course), the same as we are all predisposed to be afraid of spiders? In fact, I think those two are located on the same chromosome - which she must be missing. I guess this means my little girl will grow up to be an entomologist. However, I refuse to put the dead bugs she finds in shadow boxes for display. Bad mommy.