Is Zina Against Fitrah?
I don’t think so, however, we have been given very clear injunction to stay away from zina and anything that can lead to it.
Because sex with a stranger is considered as disgusting behavior in the west similar to sexual perversions. The people involved in it are called as “perverts” & women as “Sluts”. Which is a proof that even secular west has ethical standards. and if laws were relaxed concerning divorce, people would again revert to marriage in large numbers rather than partnerships.