 Returning home from a night out , Peter brings home Tiffani Thiessen from Saved by the Bell , naively thinking he is allowed to have sex with her . The reference is made clear when Peter asks her if she bought a necklace using her money from the show . Tiffani also tells Peter he need not worry about her conceiving , as she is " already pregnant . " In real life , Thiessen was expecting her first child at the time . After Lois decides to leave Peter , she is shown shopping for groceries at the Quahog Market . Quagmire sneakingly approaches her from behind , saying his " giggity " catchphrase to the shark motif composed by John Williams for the 1975 film Jaws . 
