The email is a series of pictures of what appears to be a hot girl: blond hair loose on her shoulders, Kenny's hand squeezing her thigh, the curve of her back with her dress hiked up to her shoulders. The last picture reveals what Kyle had already guessed: the "girl" is actually Butters, asleep in Kenny's bed with his wig askew and his fingers in his mouth, the words my girlfriend is hotter than yours fyi typed under the last picture.