Even odder is Lois says she recognizes Superman's kiss, so why does she not recognize Clark's kiss as the same? Although that might be because the kiss shows a certain attitude towards women and two men having that attitude does not prove they are the same, although a man not showing it at all shows difference.
Doesn't Lois say in canon Vatman "I've kissed Superman and *that* wasn't him"? Or something to that effect?