Sexual addiction - what happens if you can't get any?

I'm watching wild and surrealist British stand-up raconteur and comedian Russell Brand promoting his new autobiography of his "eventful" life, which apparently starts with him checking into a clinic for sexual addiction.

It strikes me that Russell must be quite lucky to have sexual addiction problems, what with ladies apparently finding him generally attractive and therefore there's always a dealer. And of course, sex is (generally) free at the point of purchase. What happens if there's a sexual addict who just can't get laid?