In reality he knew his asshole wasn't pristine after one wipe. You might be surprised but some people are that fucking lazy.
I'll wipe til the toilet paper comes out clean. That is good enough for a lot of you plebs, but it's not. After your toilet paper is clean, you should then wet it with the sink and wipe again (you'll see there's still a lot of shit left over) and repeat til the wet toilet paper comes out clean. Finally dry your self with a dry TP. That's the only way if you're not using a bidet.
You guys walking around without using wet toilet paper don't realize how how aweful you guys smell.