Could it be ball bearings inserted under his shaft skin? I fucking hope so because if those are warts, and she's lickin' 'em 'n' shit ... omg it doesn't bear thinking about.
This is the first porn vid that I've ever seen where a person actually had large visible genital warts on their junk. This is also the first time in a very long time that a porn vid has grossed me out. And that's saying a lot.