Before or after?

For the last 2 months, karen had been trying to convince me that pre-marital sex is a necessity. And i must say, she's really convincing! For example, how you need to test drive a car before u buy a car, then how sex can affect a marriage significantly, etc.

I'm now slightly confused by the principles that i have always believed in all my life. It's like, i'm now forced to re-think about them thoroughly. Maybe it's about time anyway......