Mara is also known for her charity work and oversees the charity Uweza Foundation, which supports empowerment programs for children and families in the Kibera slum in Nairobi, Kenya, one of the largest slums in Africa.
Instead the 27-year-old reveals: 'I was pretty prude'.
She is also one of the representatives for the Humane Society of the United States.
Blue balls are not healthy.