[quote name='kakomu']Ass itches are probably more about the surface you're sitting on, sweat, what underwear and pants you're wearing, weather and other non-poop issues.[/quote]
Can't speak for anyone other than myself but for me, it's half and half. My ass is probably more sensitive than most ppl as I don't use the tp unless absolutely necessary (read: if I'm not home) so if there's a tiny area I missed, it'll itch like crazy and when I get home, more often than not, it'll be the tiniest piece of shit that dried out and crusted up.
Can't speak for anyone other than myself but for me, it's half and half. My ass is probably more sensitive than most ppl as I don't use the tp unless absolutely necessary (read: if I'm not home) so if there's a tiny area I missed, it'll itch like crazy and when I get home, more often than not, it'll be the tiniest piece of shit that dried out and crusted up.