Stifling Joy!

[John V]

Um, mainstream and "some" have rather different connotations yes?

Possibly.

And Christianity has a long history in this regard. During the Middle Ages the number on holy days in which you weren't supposed to have sex, actually lowered the birth rate at a time when people were have trouble maintaining population.

We're not in the Middle Ages.

Many of the victimless sins of Christianity are sexual. You may be more enlightened and more power to you. But I look at Christianity historically and as it impinges on secular society today.

Many studies show that married people are happier than singles, and conservatives are happier than liberals. Here's one that also shows that those who follow the typical religious plan of waiting until marriage for sex report better sex and better marriages:

Banned birth control in Ireland, banned sex toys in several U.S. states, anti-pornography laws, etc. are Christian motivated. So are abstinence only sexual education programs and often anti abortion laws. Taken as a whole it's a sexual misconduct obsessed religion.

Problem is that you're assuming that things like birth control, sex toys, and pornography lead to greater sexual happiness. Here's a study on porn and sexual satisfaction:
"After consumption of pornography, subjects reported less satisfaction with their intimate partners—specifically, with these partners' affection, physical appearance, sexual curiosity, and sexual performance proper. In addition, subjects assigned increased importance to sex without emotional involvement. These effects were uniform across gender and populations."