It ensures that there is proper conduction of heat
During the 1960 debates between the two candidates, Americans for the first time could tune in and watch the debates on television, or listen on the radio. ... When they turned on their television sets, they saw a tired Richard Nixon and a tanned, fit John Kennedy
Intrauterine device/contraceptive
The 2 types are a hormonal IUD or copper IUD.
It is a T-shaped device that is inserted through the cervix and placed in the uterus. It releases a chemical substance that damages sperm in transit to the uterine tubes and prevents fertilization.
Contraindications: active pelvic disease, abnormal uterine bleeding, severe uterine distortion, and for the copper IUD patients with Wilson’s disease and copper allergies.
Opiates, a class of drug.
Carcinogen i think this is the answer