In the better movies Seth Rogen has starred in or written, there's plenty of heart and some traces of brain to go with all the gags that involve genitals. Neighbors 2 is oddly touching because it's about how Mac Radner (Rogen) and wife Kelly (Rose Byrne) uncomfortably realize that they aren't cool anymore. Some of the things they enjoyed in their 20s are now grossly irresponsible.
But forcing the characters to relearn these facts again and again makes them seem less sympathetic and more annoying. How much time do we want to spend with people who would love to have keggers when they're on the verge of buying a second home? Director Nicholas Stoller, Rogen and three other co-writers still manage to find plenty of gross-out gags to fill 90 minutes, but one has to wonder if Child Protective Services might need to straighten Mac and Kelly out.