Jaitea said:

Muddy's argument that the line in ROTJ is fine because he sees the kiss in ESB with the ROTJ 'Somehow I've always known' reasoning in mind,....hes filling in the gaps,.....hes using his knowledge of ROTJ when re-watching ESB which makes the line OK

Sorry to burst your bubble, but that's not actually how I see the kiss in ESB. In ESB they're not yet even hinted at being brother and sister.....so it's just a kiss between 2 people. Period.

I don't need to bring any of ROTJ into ESB when I watch it. The sibling revelation happens in ROTJ.....and then Leia's line, later in the same film. ESB stands perfectly well on it's own without me having to watch it while thinking of ROTJ as a crutch. In fact, I'd reverse your faulty logic and say that all those who have a problem with the "incestuous kiss" are only having that problem because they're thinking ahead to ROTJ.