If you follow the polls and shit on Sankaku (not a reliable source really, but a mildly lulzy one). Most of the older women in Japan (30-45) are huge cunts. Therefore, it probably bleeds into anime where not putting your dick into loli-pussy = a failure of epic proportions.
And getting hugged by older women, irrespective of how hot they are, is also an equivalence of epic proportions.
But I'm not Japanese, what the fuck do I know.