Two and a Half Men · S1, E24
Can You Feel My Finger?
One of Charlie's many women fears she's pregnant, and Charlie is relieved when the lady finds out she's not. When Alan realizes that this is not Charlie's first pregnancy scare, he suggests a permanent solution for Charlie--a vasectomy. Charlie's doctor recommends freezing some sperm in case Charlie changes his mind about having children, but things don't go quite as planned.
