The girl would not kiss you at all if she was not at least a little attracted to you. Trust me, most of the girls are not afraid to reject man they don't like.
You are right, and that's why I tell her at the end that it was just a "plan" I developed to get her to kiss me. Chances are that she will give you a tap and laugh, but if you are a good kisser and she actually did enjoy it. Believe me, she will want more.
You can also do it a couple of times with the same girl as a "inside joke", but a inside joke that actually makes you K-close

.
Peace