Can someone help me understand this joke....

Today while listening to Townes Van Zandt, he tells a joke on a live album: What's white and crawls up your leg? Uncle Ben's Perverted Rice. Am I too young to understand this? Is there a historical element to this missing?? Is it just obsurd? Thanks in advance and hope this is the right place to ask this question.

You might also enjoy

Many of the jokes are contributions from our users. If you find anything offensive and against our policy please report it here with a link to the page. We will do everything to make this an enjoyable platform for everyone.