In my opinion, the whole "holding off on kissing/touching" thing should end at engagement or whenever the couple has decided that yes, they are going to get married. Kissing before that decision could cloud the decision. Not kissing afterwards is just weird.
And I wouldn't make an hard and fast rule either way... some people would find holding hands to be going to far before engagement, others see nothing wrong with making out. I'm not here to judge any of them.
We are just not going to agree on that. If that were the case, my judgment would have been clouded in sixth grade, when one of my Catholic school classmates, a boy, had a boy/girl party where I first played spin the bottle. I attended several of those kinds of parties, well chaperoned of course, several times thereafter.