Why is ocean water fun?

... and rain is not?

Fritzi: I know it's a gui-duck shell, but I let her pretend it's a frisbie.

When it was raining Fritzi looked like drowned rat... wet, head down, ears droopy, shivering slightly, not amused. But, go on the beach and throw a beach frisbie into the water, there's no hesitation to get wet.

I am starting to suspect that he only gets that wet, salty and sandy because he wants to be enveloped into a towel and dried off all over. He loves that.