That was too cute! Ashton loves, LOVES water. Sprinkers, his little blue kiddie pool, lake, ocean, puddles, one time my bubble bath... yeah, if water is involved you will find Ashton in the middle of it.
The first time we took him to the lake we took our other dog Brynner, who also loves water, and Ashton was more than happy to try to follow him in. We also waded out which encouraged him even more to go into the water. We made sure he knew he was safe (he had a doggie life jacket on) and this was fun. Perhaps Spartacus needs a swimming buddy to help encourage him?