Wouldn't you know you would pick something he didn't like to suggest it was all going to be great fun ?? D'OH !! ha ha
Maybe you just let him grow up as a weenie, just to make sure he can't strong arm you till you're 80 or so. Then if he can't swim, you can run in the water to get away from him.
Hahahaha, thats a fabulous idea. I shall do my best to make sure he doesn't learn and that way if I move to a nice wee house by the sea then I can always run in if he comes after me for the final challenge! :OD