Sex and secularism.

From the Daily Mail (and reported extensively all over the place):

Atheists have 'better sex lives than followers of religion who are plagued with guilt'
Atheists have far better sex lives than religious people who are plagued with guilt during intercourse and for weeks afterwards, researchers have found.
A study discovered that non-believers are more willing to discuss sexual fantasies and are more satisfied with their experiences.
Both groups of people admitted that they carried out the same activities such as masturbation, watching pornography, having oral sex and pursuing affairs.
But followers of religion did not enjoy the experiences as much due to the stigma created by their belief systems, the study found. It left them with intense feelings of regret after they had climaxed.
The findings emerged in the 'Sex and Secularism' survey of more than 14,500 people carried out by psychologist Darrel Ray and Amanda Brown from Kansas University.
All of the people who were questioned were found to have sex around the same number of times a week. They also became sexually active at similar ages.
But devoutly religious people rated their sex lives far lower than atheists. They also admitted to strong feelings of guilt afterwards.

Read the rest of the article, which includes a bunch more of the results, here.