It's a single of the many insecurities prompted by the narrator's Internalized Categorism-she feels predatory and like a betrayer for crushing on straight women. Three seasons later on, Pip designed his last appearance on the display in the episode "201" to beg the Mecha-Streisand to spare South Park the mecha responds by crushing him to loss of life with her foot as he tried to operate away, officially killing off the character.