Like a duck to water

Walking through town I came across these two regulars. These ducks seem to always be around the town and together. Now don't get me wrong it may be that there are a lot of ducks around the town, who am I to know he difference but hey, we see these ducks a lot!
However it wasn't their occurrence that got me, it was the fun they were having in a puddle! Correct me if I'm wrong but surely ducks swim in lakes, rivers, canals etc. Well it looked liked Christmas had come early for this female duck having a quacking good time in this puddle while the male looked on...waiting!