South Park (1997)
S02E10 Chickenpox
Episode Overview
Cartman's mom devises a scheme to infect the boys with chickenpox by inviting them for a sleepover at Kenny's place. While Stan and Cartman develop the illness, Kyle stays unaffected. Upon learning about "the parental conspiracy," Kyle and the other boys decide to hire a prostitute to infect their parents with herpes. In the meantime, Kenny's mom and Kyle's mom work to reconnect their husbands, who were childhood friends but had lost touch over the years.