This is why you should never put toilet paper on a toilet seat again.
Bacteria can not multiply on the bare skin, so only contact with the toilet seat is not bad at all. Toilet paper, on the other hand, is a completely different story. It is generally known that almost no one puts down the toilet seat after use.
As a result, the bacteria will spread through the room and nestle in toilet paper. The surface of the paper makes it extra easy for bacteria to nest on it. The same applies to the faucet and hand dryers. The faucet is used just after the act, and is then touched again after the hands have been washed. So next time you have to use a dirty toilet: The toilet paper may be even dirtier than the toilet seat itself!