There are many, many ways of expressing affection. Kissing is only one of them. Affection is an EN, kissing IS NOT. A man who is using you as a sex toy will kiss you, but he feels no affection for you, so you can't equate the two. I suggest that you are placing waaaaaaaaaay too much importance on something that is really trivial within the larger context of what it takes for a couple to have a successful relationship.
I don't agree that "Affection is an EN, kissing IS NOT." If I associate kissing as an expression of Affection, then it is important to ME. It's not the total picture of "Affection", but it might be weighted more by me as a sign of Affection than some other behaviors.
As far as someone using kissing for something other than what it means to me, I don't have control over their interpretation or intent. It just means that I won't assume that it has the same meaning. That still doesn't mean that it isn't a part of the EN of "Affection" for me.
I do agree that we should be open to exploring other ways of creating a successful relationship. Keep in mind, however, that other cultures have also been socially conditioned. Also, my definition of "successful" may not be the same as someone else's. If it's a matter of not divorcing, I don't necessarily see that as a "successful relationship".
Setting that aside....
I always find it a bit humerous that on internet dating profiles someone states that "You must be a good kisser". Hmmmmmmmmmmm...how do I know what they define as a "good" kisser? More importantly, I don't go around kissing myself to find out if I'm a good kisser!! <img src="/ubbt/images/graemlins/wink.gif" alt="" />