Are atheists who have the freedom to be ually promiscuous but choose not to more moral than Christians?

Christians don’t have the freedom to be ually promiscuous; they have imaginary chastity belts on at all times. Atheists don’t have such chastity belts but many atheists choose not to sleep with random strangers. So Christians are forced to be moral whereas atheists choose to be moral. A free man chooses; a slave obeys. Who is the best example of morality; people who are forced to be moral or people who choose to be moral?