"you wouldn't buy a car with out taking it for a test drive would you?"
OMG. A person with whom you want to spend your entire life is not a thing, a car, an object to be purchased. So, if the person is not good in the sack, does that mean they have absolutely no other qualities that would cause you to want to spend eternity with them? What if they are loving and kind and respectful toward you? Is that negated by a lack of sexual skill? And what if they are very good in the sack but they fail in dozens of other ways? Does that mean you would keep them and ignore all of the bad traits just for the good sex?
People aren't commodities. I would be hurt if someone wanted to be with me just for sex with no regard for anything else I had to offer them. Excuse me but I think this whole "test drive" attitude is very shallow and disappointing.
I'd love to see what the women on this group would say if their men said to them, "Honey, you're not very smart and you're not very pretty. You don't bring home the bacon and you can't cook it either. You're a lousy mother and you've got hygiene issues. But, hey, I'm only with you because you're great in the sack so none of that matters anyway. Roll over and spread 'em."