For most of the kissing scenes between Buffy and Angel, Sarah Michelle Gellar and David Boreanaz would prank each other by eating onions, garlic, cheese and the like to force each other to kiss with stinky breath.
Lyle and Tector Gorch were named after the characters played by Warren Oates and Ben Johnson in The Wild Bunch (1969).
A promotional poster for Ally McBeal (1997) is shown in the mall. Numerous Buffy alumni would appear on the show most notably Armin Shimerman, Mark Metcalf and Sarah Hagan.
Cordy refers to a girl 'having sex in a car'. If she is referring to herself as it is implied then she is the first of the younger Scoobies we know to have lost their virginity.
Xander suggests that Willow should teach her egg the "dreidel song". This is in reference to the children's Hanukkah song "I Have a Little Dreidel" (written in 1927).