Can you get ill from interacting with your own anus?

To keep details sparse lets just say I enjoy anal 'play'. However, im always tempted to lick or insert objects into my mouth after they have been used 'down there' but I dont because im scared of getting ill from doing it.

So basically I want to know whether it is safe to do this or not? I know a lot of porn stars do it but they most likely do a totally clean out before engaging.