I was born without a sense of smell (congenital anosmia). It's all just air going up my nostrils. Perfume, farts, fresh cut grass, food, gas.... I can't smell any of it.
@Richard65 i've only met people who lost theirs later in life, that's it. I have a running joke when someone forgets that I can't smell and asks me "What is that smell?". I sniff the air and say "smells like peanut butter" :P
