Girlfriends - Season 2 Episode 8
Joan's Birthday Suit

On her 30th birthday, Joan grows depressed at the realization that she hasnt had a lot of excitement in her life. She determines that she will live life to its fullest in her thirties, and demonstrates her new philosophy by taking her friends to a nude beach--where they run into her father. Meanwhile, William suggests a pre-nuptial agreement to Yvonne, and is surprised by her response.