Sex is sold on the street, sold in the media, sold in the movies. Sex is a release or a job. Sex is oral, anal, penetration, kinky. Sex is sleek, slim, and well curved. Sex is Madonna's crappy book, and Pamela Anderson's stupid videos that keep getting released.
Sex is a penis inside a vagina.
There is much more than what you describe. I agree with you. I don't agree with sex before marriage. To me, sex is the ultimate act of love. One to be cherished and saved until you have that stupid marriage license and sure that your wife is the one you will be spending the rest of your life with.