 Both Luanne and Bobby are enticed by the charm of "self-proclaimed" genius Rad Thibodeaux, much to the dismay of Hank. After an incident at Boomhauer s house, where Bobby was supposed to be house-sitting, Luanne and Rad break-up. Upset with Luanne over the recent revelation he begins to perform a series of practical jokes which she retaliates to. For Bobby s final joke he replaces Luanne s birth control pills with candy. With the assistance of Hank and Peggy, Luanne convinces Bobby that because she didn t take her birth control pills she is now pregnant and Bobby must marry her.