Many parts of the body with exposed membranes but no taste sensors ( such as the nasal cavity , under the fingernails , surface of the eye or a wound ) produce a similar sensation of heat when exposed to hotness agents .
Many parts of the body with exposed membranes but no taste sensors ( such as the nasal cavity , under the fingernails , surface of the eye ( cornea ) or a wound ) produce a similar sensation of heat when exposed to such chemicals .