You overlook the possibility that pre-marital sex is forbidden in many cultures for practical reasons. The "modern western" view that the sex organs are a form of home entertainment system ignores the purpose they actually serve and is socially destructive. In this, I understand perfectly why the radical islamist feels the need to defend their society by attacking us.

I will not comment on killing innocent women and children, as I think it is a straw man and doesn't belong here, but I do not think that if we can only get a bunch of Arab men laid, that it will stop the fighting.
Oh no disrespect meant, the comment was more sarcastic than anything.
Monogamy and restrcting womens premarriage sex is tied upw ith males control of females.
I am not just talking about the modern western version. Hunter-Gathers usually had premarital sex as did tribal cultures (although the chiefs daughter was often a virgin).

Monogamy is linked to agriculture and preventing men from being cuckolds.