Graham, forgive me if I 'edit' you but the way I remember sex is that the more passionate you are, the more you put into it and the longer it lasts, although you still get moans and groans!
Oh, how I enjoy the peaceful nights these days and the passionate mornings watching tench and crucian bubbles pinpricking on the surface, surrounding my crowquill float as it wavers from side to side, and my right hand hovers over the rod in anticipation of a sudden ... oh sh.t, I've just woken up again!