(Post 12 in a series)
Another measure of sexual behavior is the frequency and duration of sex: How often and for how long. Here are more data from the NHSLS.
The first number represents the average number of times they had sex in the previous month. The second number is the percentage for whom the last sexual event lasted 1 hour or more.
7, 26% No religion
6, 18% Mainline protestant
7, 19% Conservative protestant
7, 19% Catholic
6, 20% No religion
6, 12% Mainline protestant
7, 14% Conservative protestant
6, 16% Catholic
So, it looks like Christians have sex just as often as those with no-religion, but they take less time doing this.
This is quite likely due to differences in marriage rates. Only about 8-9% of the married people reported the last event lasting 1 hour or more; whereas, 30%-36% of the non-cohabitators reported the same.
Source: Sex in America, Michael et al. 1994, p. 137.