it was sex at its most basic , a wild , primitive drive to possess and be possessed , exulting in the sense of mutual passion for total fusion , the wild incitement to give and take and rise together to the exquisite tension before climax , feel it coming , feel it burst upon them , hug the sheer ecstacy of it , then slowly , slowly slide into euphoric contentment , lying nestled together , snug in their private little world , stripped naked of everything but themselves .