I Hate My Body (1974)

"The brain of a man... the body of a woman... the sexual horror story of our time!"

The brain of a male engineer is transplanted into a female’s body. He soon finds it very frustrating to cope with the daily sexist discrimination most women deal with. For example, he is surprised when no one will hire a female engineer. When he is faced with dealing with female sexuality, he quickly begins exhibiting lesbian tendencies.