Can I answer this question ...... ... I've bought a couple of cars without ever test driving them .... and it turned out very well for me.

In answer to the sex before marriage thing ... like Lil said, people make choices for a variety of reasons, I condemn neither view point, nor the presentation of why someone makes that choice ... we do what we believe we will be comfortable with for the most part in this life, that's how I make my decisions ... not worrying about whether or not someone who might hear my reasons for a decision finds them a worthy argument.