It’s bluntly cheeky, it goes on for too long, but the concept keeps on giving.

The film is surprisingly amiable, thanks to the commitment of its lead actors and its refusal to condescend to its characters.

The hit rate gets better as the film lumbers along and the scenarios grow more extreme, but it takes a certain degree of perseverance to roll with this thing until it pays off.

Lacking real zest or fun, it’s a middling effort, if one with ample heart and good intentions, that happens to star two actors who can rise to the occasion when necessary. Working together, it’s a shame that they serve both as this frustratingly mediocre comedy’s most reliable pleasure and most consistent disappointment.

Almost nothing anyone does registers as recognizably human; it’s all just a pretext for yet another round of envelope-pushing outrageousness.