For some unknown reason, Julia Roberts and David Letterman have a long-standing tradition of kissing each other. And since Letterman will be wrapping up his run as host of The Late Show next week, they just had to get one final smooch in there.

Some find it sweet, others find it uncomfortable. But let's chalk it up to nostalgia, and let these two old friends (Roberts has appeared on the show 26 times) enjoy one last tender kiss.

They've come a long way since Julia thought Dave would think she was just another dim-witted actress.