Some people are just plain nasty. Maybe they have horrible hygiene habits, perhaps they have zero disregard for public decency, or possibly they are just complete and utter slobs. Whatever the case, the following people have truly seen some horrendous behavior, as they recount the dirtiest thing they've ever witnessed someone else do.
"Years ago, in the Navy, we were at sea and bored, so we had a gross-out contest. There was this one guy who was dared to eat the waste from another guy's electric razor, which he hadn't cleaned for some time. He agreed to do it for $50. The deal was he had to swallow it all or he wouldn't get paid. The razor was opened and emptied on a table. We watched as he ate the whole pile of disgusting hair, dead skin and dirt. We were howling with laughter and retching simultaneously. He finished all of it, swallowed it and was paid the $50. He immediately ran to the heads (toilet) and threw up" (Source).