I have a pup that will piddle so much (he was neutered at 6 months) he will wet both back feet. His owners wanted to know how to teach the boy to lift his leg outside, so they'd stay dry.
The dog I had before cavvies never ever cocked his leg. Now I have a cavvie girl with three brothers - she often tries to cock hers always falls over!
Plenty time yet for your little lad
Oscar is 6 months next week and he cocks his leg when we out for a walk but squats in the garden!!