I’d call slow sex any sexual activity where both partners are content to simply take their time.

It’s sex where the goal is not to climax, or splatter with cum, but instead to simply enjoy the physical sensation of being intimate with another human being. Feeling the warmth of your partner’s body. And the thrilling buzz you feel from their every gasp and giggle.

It is a form of sexual mindfulness, where each successive moment is savored for its fragile transient beauty. A time to appreciate how something as magical as love could actually come to exist in this cold, empty universe of ours.

tl;dr

It’s different from fucking.