It's important to understand that love and sex have always gone together, "hand in hand." Love, in most terms, is just another way to keep populating the Earth..
Let's also point out that there is a difference between making love and fucking. Fucking is flat-out imitation of boring pornographic positions. Love making is the use of the entire body in order to stimulate an energy between you and your partner.
So, it all depends first on the method, or the mood during sex. This is what determines the "love factor."