If there is important information contained in said smell (for example, hygiene levels) then masking it would indeed be deceptive. If on the other hand some smells are simply disagreeable on their own, not evidence for disagreeable traits (EDIT: remember, adaptation-executors not fitness-maximizers,) then deodorant is not deceptive.
If there is important information contained in said smell (for example, hygiene levels) then masking it would indeed be deceptive. If on the other hand some smells are simply disagreeable on their own, not evidence for disagreeable traits (EDIT: remember, adaptation-executors not fitness-maximizers,) then deodorant is not deceptive.