This super politically incorrect, and would probably be robo-deleted on Reddit, but that's why I'm on Voat, LOL.

Most Americans and Europeans are not aware that in South Asia (India, Pakistan, Bangaledaesh, etc., people don't use toilet paper. They use their left hand, and a bucket and a mug of water to wash off their bottoms after doing the doo doo.

Unfortunately, western privies aren't set up for this, and certain slobs don't even bother to do it properly when they do have the Indian style of items. What this means is that inspectors routinely find fecal contamination in food and drinks in restaurants with South Asian workers.

http://www.bbc.com/news/uk-england-nottinghamshire-34337626

http://www.dailymail.co.uk/news/article-3537652/Swindon-takeaway-chef-prepared-food-wiping-bottom-bare-hands-doesn-t-use-toilet-paper-cultural-reasons.html

https://conservativedailypost.com/starbucks-crumbles-as-investigator-finds-30-of-coffee-tests-positive/?utm_source=Push&utm_medium=OneSignal&utm_campaign=29_June-2

BTW, the last article is misleading in that the contamination is not only a muslim thing. It has to do with people of all religions from countries where the mug and bucket technique is common.