‘I Do ... Until I Don’t’ is feel-good comedy about marriage from Lake Bell

In Lake Bell’s second feature effort as writer-director-star, “I Do ... Until I Don’t,” three married couples in the sleepy Florida town of Vero Beach havc their lives upended when a filmmaker from the BBC arrives to make a documentary about marriage.

Actually, it’s a documentary against marriage. The premise: Since human lifespans have become so much longer over the centuries, marriage should now be seven years contractually, with an option to renew every seven years.

It’s an angst-ridden, sometimes contrived film, but it features Paul Reiser on a motorcycle, a full-blown meltdown from Mary Steenburgen, and the odd pairing of Bell and Ed Helms as husband and wife.