From traditional Asian perspective, casual sex is something that really awful, weird, bizarre, and disgusting. And they often become pornophobic.
I often see when lewd couples was declared for being guilty just for having sex. Especially country with most of the people is Islam. And especially at Ramadan. Just like in Indonesia, our government banned every porn content on internet. Reddit was banned. Tumblr also banned (but the ban was lifted due to huge protest in Indonesia). Google and Youtube almost banned (F*CK YOU ICMI). Malaysia is even worse. And Chinese is the worst. The most funny is a woman in Aceh( Indonesia) was found guilty and get sentenced for get raped by numerous men. Seriously, she is the VICTIM.
But cast that all aside. Let's back to the topic.
Personally, I think that we should treasure our virginity. I only want to having sex with my wife. And I don't want see my wife having sex with other (I want get married to virgin girl, it's my dream to take other virginity (YEAH I'M PERVY GUY)). Sex was done only for making child. Pleasure is bonus. Although we cannot having sex, we still can make a happy family. If you have religion, you should notice that the teaching of sexuality already exist since a loooooooooong time ago. (Most of American is Christian, but why most of them still having sex like an animal?) We are living in globalization era, and we should do the positive, not the negative ones. Indulging self with desire was characteristic of ancient civilization. Casual sex is declining of human civilization.
Well, that's my opinion. I don't mean any offense. That's all.