>>93096377One of the most useful pieces of advice I've heard about writing sex is to channel the 5 senses during the situation. Of course, that can be said for almost all writing but with how repetitive the motions of sex are, I think it lends itself extra well here.
The smell of sweat, the soft and warm touch of flesh, the sound of moans and two (or more) bodies connecting, the dishevelled sight of your partner(s) and how they may taste. Bringing all those together paints way more of a vivid picture than just describing the action