from a puppy, when housebreaking them, I would say 'wanna go out?' as I took them out to potty. I guess they associate what I'm saying w/ going out now. Now, they come tell me. lol. They just have this 'look' when they hop around my feet. So I ask 'wanna go out?'
and they make a beeline to the back door. lol
It's the same when we take them in the car. 'wanna go for a ride?'...happy beeline to the garage door.
They know the difference to the two words, as they always run to the appropriate door...out & ride.