The advert was produced and released in 1967 which is the same period of time where equal pay act was introduced 1970.
Both men and women wore clothes for the jungle however the woman had more revealing clothing which depicts the sexualisation in that period.
The setting of the jungle is a tough environment which requires a tough male character.
It is also important to note that all of the models seem to be British and are all white. This is probably due to the fact that racism was still around around the time of this advert. Furthermore, the male model has muscular, hairy arms which further creates an extremely heterosexual advert.