In time. In time. lol
When we have bath time, I get total silence lol. They know what's coming. Last bath: Willow (through body language) objected, but once she got under the shower, she went bananas and we spent a good 20 minutes with her jumping from the shower curtain to my head to my hand asking for more. Leo, on the other hand, wanted none of it. Quick dip and he was more than done.
You'll get the "NO!" when you offer a finger for a step up for bedtime and your grey doesn't necessarily think it's bedtime. Or some similar situation.