Do you consume a lot of things with vinegar or lemons?
If I drink lemonades I'll hear comments like, "It smells like lemon Pledge."
I've drunk apple cider vinegar in water and diet Sugar (tastes pretty good) and heard a person out in the hall, "It smells like apple cider vinegar."
Seems what I eat I smell like except things with protein such as meat, cheese, beans, or nuts. Those will make me smell like feces.
Try to eliminate vinegar and lemons from your diet for a couple of days and see if that doesn't help. Also, read labels. You'd be amazed what has lemons and don't even know it.