I am actually supportive of Ash's dense characteristics in a realistic way. I mean he can be sexually attracted to women (or May for the purpose of this thread) when he reaches a certain age, he knows what love is. But..there are a few things he's insensitive to. While I agree the anime over-exaggerated it a bit since BF and comedy harem fics use this an effective tools, in a more realistic sense Ash is still dense. But however the word dense doesn't mean he won't blush when a romantic incident happens, doesn't mean he won't ever fall in love etc. He's just insensitive to a few secret hints May throws at him, that is all.