Virgin until marriage is bullshit

Give me an example. Your other examples are not things that can't be worked out or avoided before hand. There are other ways to get sexual pleasure than through penetration. Also, what if you're already married and then your spouse gets in an accident that makes them unable to have sex? Should you just leave them, then, or should you stay and work it out and find a way to compromise?

I'm not looking down on all people for any reason they decide to end their marriage. I'm saying that fear of "sexual incompatibility" is not a good reason to have sex before marriage to "make sure you're compatible." You're getting into an entirely different topic of divorce.