I'd say no to the sucking himself, but I agree with Lio. It looks like the girl is about to pee into the funnel that is going into that guy's ass. Why they are doing this, I couldn't even begin to tell you -- some people are really f_cked up. I'd say it's more his deal than hers, but what kind of woman goes along with that? So beyond bizarre...
Here's a question. Where are they? Is that one of their homes do you think? Look on the dresser, next to the plant. Is that a sugar thing from a diner?