One of the old time dating coaches had a handle of "doc love". He had an entertaining book and cd set called "the system".
He addressed this exact question. His answer was; us guys don't know. Only the girl knows the right time. He also would hammer on the idea that it doesn't matter how high our interest is in the girl, it only matters about her interest.
It was long ago, I tried some of the advice in his stuff. Most all of it works, it works well enough to make it. Later the problem is no second season in the book on how to deal with LTR... If I recall right, he also covered how to deal with small talk on a date in case that's not easy for someone.
He didn't really talk about plates, only one by one.
The girls KNOW you want to kiss and they know that's why you are there. If they LIKE you they gonna take care of that.