Have you ever tried making love on a waterbed? Ask a swan what it’s like. Archimedes could have predicted the outcome; you are far less buoyant with a swan on your back.
The male has to get a move on or his long-term mate will drown. He has to grab her by the back of the neck to keep her head above water.
I’d missed all the romantic heart-shaped-necks arrangement and the hisses and grunts. That had happened before I arrived and discovered them in the act. Now it’s time for them to face one another, grunt and snort and paddle at one another, face to face.
They make a lovely couple and I can see a clutch of very large eggs in their immediate future.