The President's Coming! The President's Coming! (1) - S5-E25
Corrected entry: This episode is a series of flashbacks. The flashback of Blanche grabbing her towel from Dorothy when the roof leaks, Dorothy says, "I am in no mood to hear about the endless sexual escapades that have occurred up and down the Florida coastline, with only this towel between your flesh and the cold wet sand." Blanche replies with, "I brought my son Skippy home from the hospital in this towel." In the original episode, Blanche replies with, "It wasn't ALL up and down the Florida coastline."
Correction: In the original episode, Blanche states both, not just one.