Now that I think on it, maybe the dumpster was cleaner than their home. I've seen some sickening homes and anyone who'd jump in a dumpster for sex probably isn't a neat freak.
Remember the pics posted here of that gal with trash and thousands of cigarette butts covering everything? Her cat box was one of the nicer things in there. I think a dumpster to her might be like a luxury suite in a hotel.