A kitty tale: https://www.youtube.com/watch?v=8C4pzEgncFY
A word of advice: Do NOT attempt to teach your dog or cat to do this no matter how cool it looks UNLESS you are ALWAYS present to supervise. There are also cases of drowning when pets do this unsupervised. Always keep the toilet seat and cover down after use.
Actually, without training, Bunny knows how to do it too!
This photo was taken on 19th June, 2011, in our old house.
Now, Cow & Bunny urinate into the drainhole in the garden. No one taught them; they just do it all their own!
BUT...they also spray (but that's for a different purpose - to show who is boss!)