Nope. If you ask any criminologist they will tell you that the reason why our justice system doesn't work is because you need three things in order for it to be effective as a deterent system. First, you need people to think that it is very likely that they will be caught. Second, the court system has to be swift. And third, the punishment has to be both swift and final. We only have the first one out of the three requirments. Hence, our woeful state of crime.
That's an opinion on your part. If you want, I could start polling a lot of my sociologist friends. Hell, I'll even ask some professors if it would make you happy. In fact, I'll even get their signatures and mail you the results. I am more than confident in that statement and I will continue to stand by it.
Finally, we're talking about the purpose of SEX here. Your infertility argument doesn't work because that doesn't change the purpose of sex. Second, you guys were the ones who didn't want to bring religious arguments into this, so if we're going to look at sex, we're going to look at it from a scientific viewpoint and I'm pretty confident that even if we didn't, if you asked people what the basic purpose of sex was, no matter if they were atheist or a believer in God, a biologist or a simple shop keeper, they would almost all say it's to have a family. Finally, if we are to bring love into the equation, that further proves my point that it's for a family because what holds a family together? Oh, that's right. LOVE!