YSK if your flatulence sometimes smells exceptionally foul, you may have lactose intolerance (or other food sensitivities)

YSK if your flatulence sometimes smells exceptionally foul, you may have lactose intolerance (or other food sensitivities)

YSK if your flatulence sometimes smells exceptionally foul, you may have lactose intolerance (or other food sensitivities)
from /r/YouShouldKnow