does it not really disgust you to think who might have sat on the seat before you on the bus, or whether the person who touched the door handle before had washed there hands or not, especially the toilet door.
it doesn't help when you see such examples right in front of your eyes.
take the other day for example.
me and kitty where standing at the bus stop waiting for the wonderful 15 bus, as usual chatting about something or other (obviously intelligent conversations) when i noticed a sort of splashing sound next to me, so i turn ever so slightly to my right and low and behold there is a man urinating not far from where i was standing openly in front of all to see, amazingly people where looking out for the bus so no one noticed apart from me and i was in complete shock and only managed to turn around to kitty and say to her 'oh my god, did... did you just see that?' to which she made a disgusted look and announced that the bus was here.
but before we could actually board the bus, Mr. Urinate, decided he had first dibs on getting on the bus and not only that, decided to touch every single thing on the bus with his unclean hands, touching the door, the seats that he walked past, the metal poles, you name it he placed his fingers on it.
that's why it triggered the whole, 'who in the world sat in my seat before me?' thought.
some one should invent disposable covers for seats.