You are correct, Crisi, about the need to guard your actions and your words with the opposite sex. Words are too easily spoken often, and they mean nothing, but they may hurt the other person who takes those words to mean something. Some of these things are absolutely meant for use after marriage, and if people violate that then they will have miserable life, and they will face God's judgement.
You are very right in what you said, BBG, about sex, hormones, and love. I think maybe the expression "making love," was invented by Hollywood,and it has nothing to do with love. If two people do love each other the way God intended them to love each other, and if they are married, then yes sex is part of the expression of love. But, we love, or we do not love, inspite of whether or not we have sex.