The plot follows Peter travelling to Ireland, along with Brian, to find his biological father, after he accidentally kills his stepfather at Meg's birthday party.

Meanwhile, after Lois spanks Stewie for destroying her pearl necklace, he becomes fascinated with it and goes to great lengths to have her hit him again, but she was guilty for doing this and refuses to because doesn't want to hurt him again after making him cry.

Unfortunately, Peter and Lois offend her by throwing her a kiddie-type party, with games such as Pin the Tail on the Donkey, and reveal that they got her age wrong as they bought sixteen candles.

At the party, Peter dresses up as "Pee Pants the Inebriated Hobo Clown", and tells Meg that he got her "a dozen scarves" as a gift which he then proceeds to regurgitate as one long scarf, as he has actually tied and swallowed them (which Lois says he was not supposed to do), causing him to cough and vomit.

Mickey finally believes that Peter is his son, feeling that nobody but a member of his own family could beat him in a drinking contest.

He runs off in fear and tears, but quickly realises that he actually enjoyed being hit and might be "one of those people" so he goes to great lengths in order for him to get spanked again.

When Stewie hears himself begging Lois to rub dirt in his eyes and violate him with a wine bottle, he realises he has problems and stops.

[4] When Peter comes to the realization that Francis is not his real father and when Stewie dreams about being tortured by Lois, a harp sound can be heard; MacFarlane comments that even small things like that take a lot of work to produce.

[4] The alcohol bottles being pushed by the airplane that Peter and Brian are traveling on were animated by computer, as is the taxi driving along the street.

The song Chris and Herbert sing at the party and up in a tree is "Friends and Lovers" by Gloria Loring and Carl Anderson.

[4] In a significant decrease from the previous week, the episode was viewed in 7.97 million homes in its original airing, according to Nielsen ratings.

"[9] IGN's Ahsan Haque noted that "despite a couple of underdeveloped plotlines and an overabundance of offensive and uncomfortable jokes, this week's episode of Family Guy somehow manages to succeed with just enough truly hilarious moments and actual story elements.