1. Wrong. If you are horny its just relief. Great that they feel great not doing this. There are also a lot of people who feel good doing this and don't suffer from any dopamine or serotonin issues. Most of the time it is related to porn.

2. Great. I could now send you a source showing that people in prison are more likely to be religious and then tell you religious people commit more crimes.

Maybe then you understand the difference between causation and correlation. Or do you have any evidence that religion is making these people happy? Compared to every other thing they might do differently in their lifes?

Rhetorical question. You can't. Unless you have people who have so much in common that the only thing that differs is faith.

If you ask 500 women in long term relationships and 500 long term single men who is happy with their lifes chances are the women are happier.

Does that mean women are generally happier then men? This is so stupid.