 Phoebe finds out about an old friend of her parents, Phoebe Sr., so she decides to go and ask her about her father. All the friends go to the beach together looking for her, but Ross s girlfriend Bonnie can t come. While Phoebe is away, Rachel flirts with Ross, Chandler tries to convince Monica that he is boyfriend material and Joey wants to get everyone to play strip poker. They end up playing strip Happy Days game. Phoebe Sr. doesn t know where Phoebe s father is, but she reveals to her that she is her biological mother. Rachel convinces Bonnie to shave her head and tells Ross about her feelings. He has to choose between the two girls.