My name is Jared, and I specialize in body health. The issue you are experiencing is completely normal. In fact more people have this issue than you think. You just don't notice because you smell like them! The only fixing it is to take garbage and cheese, and request all of your friends to put it on themselves. This will make everyone smell the same, and that will allow you to never have to hear "What's that smell?" again.
Of course this will be a little awkward on the first date of any girl you are with, but if she really loves you, she will shove garbage and cheese anywhere for you.
Thank you for your time,