Because NYers are douchebags.
I want to blame people who moved here from another state/country, but it's the natives. My friends preach the wipes. And, without knowing about this problem, I gave them a WTF look and asked how did they forget to use toilet paper.
My friends are also fat and have terrible diets. Which explains why they need the wipes - the slop they eat oozes out of their ass and with the lack of fiber (from improper eating), they need to use the wipes to root out the remaining bag for fun sized Snickers they had for dinner last night.