I'm another one who's bemused by this choice argument.
Women have always used their bodies to make a living - often through the lack of any other choice - and have always been hypocritically condemned for it, by both sexes.
What feminism has always been about is widening the number of choices available to women, so that they have the freedom and opportunity to earn a living however they choose, and not to have to resort to selling their bodies.
Which is why feminism is not about giving women the choice to parade their tits if they want to, but about giving them the choice NOT to have to rely on their bodies as a source of income.
Anyone who's claiming that women using their bodies to earn money is somehow 'feminist' or 'empowering' has been brainwashed by the patriarchy.