Catarina Migliorini, 20, is set to plough the money — currently standing at $160,000 — into a non-governmental organization that will construct modern houses in her southern home state of Santa Catarina.
Rejecting claims she is a prostitute, she said she still believed in love but saw the opportunity to make a positive difference to the world.
She said: “I saw this as a business. I have the opportunity to travel, to be part of a movie and get a bonus with it.
“If you only do it once in your life then you are not a prostitute, just like if you take one amazing photograph it does not automatically make you a phototgrapher.
“The auction is just business, I’m a romantic girl at heart and believe in love. But this will make a big difference to my area,” she told Folha newspaper.