However, the origins of this phrase are not entirely clear See ‘meaning & use’ for definition, usage, and quotation evidence. It is believed that the term first came into use in the 1960s during the height of the sexual revolution.
Study Says Sex Can Help Your Career, But Not In That Way
A person obsessed with sex
'sex machine' is an english idiom
It is a playful or colloquial term used to describe a person who is skilled or highly successful in sexual activities or relationships. There is one meaning in oed's entry for the noun sex machine
