Convertible seat with contoured-front for localized body heat dispersion and pressure reduction

A seat (chair, stool, etc.) has a seat base with a contoured front that is recessed in the middle. The recess extends towards a seating center and/or in a downward direction, creating an open area for a seated person. The open area is located under the body part around the testes of a seated male person so that the dispersion of body heat from that area via air circulation will not be blocked by the seat base, and at the same time, the pressure between the testes area and the seat base will be reduced or eliminated, thereby improving the physiological condition for sperm, and in turn, may increase sperm activity and may reduce the possibility of infertility. A mobile recessed part that can be moved in and out of the open area in the seat base makes the seat convertible.