There are lots of rumours about how Aids spreads, but don't worry - you can't get it from the following:
Sitting on a public toilet seat
Sharing glasses or cutlery
Ordinary social contact like shaking hands or talking to someone
Although tiny amounts of the virus can be found in saliva, phlegm or tears, it's most unlikely to be spread by kissing or coughing, because you can only catch the virus if it enters your bloodstream.