The direct limbic connection makes the olfactory sense unique.
[1] The brain cortical regions are related to the auditory, visual, olfactory, and somatosensory (touch, proprioception) sensations, which are located lateral to the lateral fissure and posterior to the central sulcus, that is, more toward the back of the brain.
The cortical region related to gustatory sensation is located anterior to the central sulcus.
[1] Note that the central sulcus (sometimes referred to as the central fissure) divides the primary motor cortex (on the precentral gyrus of the posterior frontal lobe) from the primary somatosensory cortex (on the postcentral gyrus of the anterior parietal lobe).
The sensory cortex is involved in somatic sensation, visual stimuli, and movement planning.