The movie would have been much better if the main character had a different attitude towards his parents' little 'mishap'. Why would anyone BROOD over the fact that their parents made love and got a baby.
Reason this movie got a lot of likes is probably because of everything getting patched up in the end and the typical emotional display. There were a few good jokes here and there but mostly because they were relatable.
The only characters I liked in this movie were Mom and Dad and their demeanor throughout the film. It was adorable