A device for reducing the probability of snoring and/or apnea during a sleep period, the device comprising: an odor disperser adapted to disperse an odor; and at least one sensor adapted to detect at least one of a physiological characteristic and a sleep characteristic of a user; characterized in that the device further comprises: a controller configured for: receiving inputs from the at least one sensor that the user is snoring or is about to snore, or that an apnea event is occurring; and instructing the odor disperser to disperse an odor responsive to detections by the at least one sensor during the sleep period, thereby reducing the probability of snoring by the user or enforcing respiration when the apnea event has started, by affecting one or more upcoming breaths of the user consecutive to said dispersing to modify respiration; said device including a learning module configured for: monitoring respiratory patterns of the user during the sleep period, and providing inputs to the controller based on an effect of odor dispersion on the respiratory patterns; and instructing the odor disperser, during the sleep period, to change any one of the type, dose and time of odor dispersed based on the effect of odor dispersions on the respiratory patterns. an odor disperser adapted to disperse an odor; and at least one sensor adapted to detect at least one of a physiological characteristic and a sleep characteristic of a user; characterized in that the device further comprises: a controller configured for: receiving inputs from the at least one sensor that the user is snoring or is about to snore, or that an apnea event is occurring; and instructing the odor disperser to disperse an odor responsive to detections by the at least one sensor during the sleep period, thereby reducing the probability of snoring by the user or enforcing respiration when the apnea event has started, by affecting one or more upcoming breaths of the user consecutive to said dispersing to modify respiration; said device including a learning module configured for: monitoring respiratory patterns of the user during the sleep period, and providing inputs to the controller based on an effect of odor dispersion on the respiratory patterns; and instructing the odor disperser, during the sleep period, to change any one of the type, dose and time of odor dispersed based on the effect of odor dispersions on the respiratory patterns. a controller configured for: receiving inputs from the at least one sensor that the user is snoring or is about to snore, or that an apnea event is occurring; and instructing the odor disperser to disperse an odor responsive to detections by the at least one sensor during the sleep period, thereby reducing the probability of snoring by the user or enforcing respiration when the apnea event has started, by affecting one or more upcoming breaths of the user consecutive to said dispersing to modify respiration; receiving inputs from the at least one sensor that the user is snoring or is about to snore, or that an apnea event is occurring; and instructing the odor disperser to disperse an odor responsive to detections by the at least one sensor during the sleep period, thereby reducing the probability of snoring by the user or enforcing respiration when the apnea event has started, by affecting one or more upcoming breaths of the user consecutive to said dispersing to modify respiration; said device including a learning module configured for: monitoring respiratory patterns of the user during the sleep period, and providing inputs to the controller based on an effect of odor dispersion on the respiratory patterns; and instructing the odor disperser, during the sleep period, to change any one of the type, dose and time of odor dispersed based on the effect of odor dispersions on the respiratory patterns. monitoring respiratory patterns of the user during the sleep period, and providing inputs to the controller based on an effect of odor dispersion on the respiratory patterns; and instructing the odor disperser, during the sleep period, to change any one of the type, dose and time of odor dispersed based on the effect of odor dispersions on the respiratory patterns.