that was hot... but why do they always have to say "No! Don't!" kind of ruins the mood for me...
Cultural differences, lol. Women in Japan are supposed to be shy and modest about sexuality and act accordingly, which is why a lot of Japanese porn features women who are only slightly more lively than a dead fish and act as if they're not really enjoying it. I've heard from people who've been to Japan and dated Japanese girls that often their approach to sexuality really is different to what we in the 'west' are used to.
(Of course, this doesn't apply to every single woman, but it's certainly a thing)