ExtenZe is a herbal nutritional supplement claiming to promote "natural male enhancement", a euphemism for penis enlargement. Additionally, television commercials and advertisements claim an "improved" or "arousing" sexual experience. Websites selling the product make several more detailed claims, including acquiring a "larger penis". Their enlarging effects are described as "temporary" which will only provide a "chubby one" while under the use of Extenze. Early infomercials featured a studio audience and porn star Ron Jeremy. Former Dallas Cowboys head coach Jimmy Johnson has also appeared in an ExtenZe commercial.